action
action — verb
1. to carry out a request, plan, or instruction so that the result actually happens
to carry out a request, plan, or instruction so that the result actually happens, typically in workplace or official settings.
The IT team will action your password reset request within two working days.
action + noun (request) in business email register
Manager Wu asked her assistant to action the urgent purchase order before lunch.
action + the [noun] order in workplace context
All complaints from customers must be actioned within forty-eight hours by store staff.
The committee promised to action every safety recommendation made after the factory fire.
Please action this email before you leave the office tonight.
文法句型
action + noun (request, plan, order, decision)
用法筆記
Mainly used in business and bureaucratic English; the object is almost always a task-noun like request, order, recommendation, or email. Distinguish from the noun senses, where 'action' names the deed itself rather than the carrying out of one.
常見錯誤
action — noun
1. doing things in a planned way to fix a problem or change a situation, rather tha
doing things in a planned way to fix a problem or change a situation, rather than only talking or waiting.
The mayor promised quick action to clean up the polluted river near the school.
action to + infinitive (purpose)
Parents demanded action on bullying after Mia came home with a torn jacket.
action on + issue
Without firm action from the government, the forest fires will spread.
Lin Wei took action and reported the leaking pipe to the building manager.
We need a plan of action before the storm reaches the coast on Friday.
- measures
more formal; usually plural and used for official or organised steps
- intervention
stronger; suggests stepping in to stop something bad
- response
implies reacting to something that already happened
文法句型
take action (to do something)
action on something
用法筆記
Almost always uncountable in this sense. Frequently appears in the fixed pattern 'take action (to do X)' and after verbs like 'demand', 'call for', 'promise'. Distinguish from sense 2 (a single deed): sense 1 is the broader idea of dealing with a situation, often used with 'on' or 'against' a problem.
常見錯誤
2. a particular thing that a person does, viewed as a single completed deed for whi
a particular thing that a person does, viewed as a single completed deed for which they can be praised, blamed, or held responsible.
Pulling the boy from the river was a brave action that saved his life.
adjective + action (a brave/foolish/kind action)
Dimitri must answer for his actions in front of the school principal.
answer for / be responsible for + actions
Her actions during the fire showed real courage and quick thinking.
Judge people by their actions, not by their promises or excuses.
文法句型
someone's actions
an action of + noun
用法筆記
Countable here, unlike sense 1. Often used in the plural 'someone's actions' to talk about a person's overall behaviour. Common in moral or legal contexts where the speaker evaluates what someone did.
常見錯誤
3. a movement of the body or part of the body, especially one that is repeated or t
a movement of the body or part of the body, especially one that is repeated or trained, such as in sport, dance, or making a machine work.
The coach showed Olu the correct throwing action for her tennis serve.
throwing / running / swimming + action (sport contexts)
A simple twisting action of the wrist opens the lid of the jar.
the action of + body part
The dancer repeated the same arm action until it looked smooth.
Babies copy the actions of the adults around them, like waving and clapping.
- stillness
the absence of movement
文法句型
the action of + verb-ing
用法筆記
Countable. Refers to the physical shape of the movement itself, not its purpose. Common in sport coaching ('a smooth bowling action'), music ('piano action'), and child-development contexts. Distinguish from sense 2 (a deed with moral weight): sense 3 is value-neutral and purely physical.
4. lively events that are taking place around you, the kind of busy scene people ga
lively events that are taking place around you, the kind of busy scene people gather to watch or join.
From the front row, Hiro could see all the action on the basketball court.
see / watch / catch + the action
The night market was full of action, with cooks shouting and lights flashing.
full of action (busy lively scene)
If you want plenty of action, sit near the goal during the second half.
Kids love this park because there is always action around the fountain.
- excitement
focuses on the feeling rather than the events
- activity
broader and more neutral; not always exciting
- happenings
informal; events viewed from a distance
文法句型
the action
plenty of action
用法筆記
Uncountable. Often takes 'the' when referring to a specific event or place ('miss the action'). Differs from sense 1: sense 4 describes the buzz of things happening, not steps taken to solve a problem.
常見錯誤
5. a kind of film built around fast chases, fights, and dangerous scenes that are m
a kind of film built around fast chases, fights, and dangerous scenes that are meant to keep the audience on the edge of their seat.
On Friday nights Sven rents an action film with car chases and explosions.
action film / action movie
She prefers action over romance because the fight scenes feel more exciting.
action vs. other genres
The director is famous for making action movies set in big Asian cities.
Kenji wants to be an action hero like the stars in old kung fu films.
文法句型
action film / action movie / action hero
用法筆記
Almost always used as a modifier before another noun: 'action film', 'action movie', 'action hero', 'action sequence'. As a standalone noun ('I love action') it stays uncountable. Distinct from sense 4: this is a film-industry label, not a description of a real-world busy scene.
常見錯誤
6. the place or scene that everyone considers the most exciting or important, used
the place or scene that everyone considers the most exciting or important, used in set phrases such as 'where the action is'.
Young designers move to Taipei because that is where the action is right now.
fixed phrase: where the action is
Sit at the bar near the window if you want to be in the middle of the action.
in the middle of the action
Reporters pushed forward to get closer to the action outside the courthouse.
Olu picked a hotel right in the heart of the action, two blocks from the night market.
- the buzz
very informal; refers to the lively atmosphere of a place
- the centre of things
neutral alternative for the same idea
- the sidelines
the place away from where exciting things happen
- the middle of nowhere
an isolated place with no activity
文法句型
where the action is
the heart of the action
用法筆記
Almost always appears inside the fixed expressions 'where the action is', 'in the middle of the action', 'close to the action', and 'the heart of the action'. Informal and slightly evaluative — the speaker views the place as exciting. Differs from sense 4: sense 6 names the location; sense 4 names the events themselves.
常見錯誤
7. the way a force, chemical, or natural process changes another substance or objec
the way a force, chemical, or natural process changes another substance or object over time, for example how rust forms on iron or how a drug works inside the body.
The action of salt water on the iron gate slowly turned it brown with rust.
the action of X on Y for chemical effect
Doctors study the action of this drug on the human heart before approving it.
the action of [substance] on [organ]
Centuries of wave action have shaped the cliffs along the Cornish coast.
The medicine begins its action within twenty minutes of swallowing the tablet.
Soap removes grease through the action of tiny molecules pulling oil into water.
文法句型
the action of X on Y
用法筆記
Subject is usually a natural force, chemical, or biological agent — not a person. Distinguish from sense 1 (DOING SOMETHING), where a human or group is the agent.
常見錯誤
8. the experience of fighting during a war, including soldiers shooting at the enem
the experience of fighting during a war, including soldiers shooting at the enemy, ships meeting at sea, or planes attacking targets.
Lieutenant Marsh first saw action during the long winter campaign in northern France.
see action: take part in fighting
Two of her uncles were killed in action during the war in the Pacific.
killed in action (KIA)
The young pilot longed for action but spent most weeks training near the base.
Three destroyers were lost in action off the coast of Crete that spring.
Veterans who have seen heavy action sometimes find loud noises difficult for years afterwards.
文法句型
in action
see action
用法筆記
Almost always uncountable in this sense and frequently appears in fixed phrases like 'in action', 'see action', 'killed in action'. Distinguish from sense 4 (ACTIVITY), which is general excitement, not military fighting.
常見錯誤
9. used in the fixed phrase 'missing in action' to describe a soldier, sailor, or p
used in the fixed phrase 'missing in action' to describe a soldier, sailor, or pilot whose body has not been recovered following combat, leaving it unclear whether the person is still alive.
Captain Reyes was reported missing in action after the helicopter crashed in the jungle.
missing in action (MIA)
Her grandfather was listed as missing in action for almost forty years.
listed as missing in action
The families of soldiers missing in action waited every Sunday for fresh news.
Three pilots from the squadron remain missing in action since the storm last March.
- MIA
the official military abbreviation
- unaccounted for
broader; not limited to combat
文法句型
missing in action
用法筆記
Used almost exclusively in the fixed phrase 'missing in action' (often shortened to MIA). Distinct from sense 8: sense 8 covers all combat experience, while sense 9 is the specific status of an unaccounted-for service member.
常見錯誤
10. the way a body part, animal, or piece of machinery moves while it works — for ex
the way a body part, animal, or piece of machinery moves while it works — for example the swing of a pitcher's arm, the gallop of a horse's legs, or the keys and hammers inside a piano.
The young pitcher worked for months on the smooth action of his throwing arm.
the action of [body part] for body movement
This grand piano has a heavy action that tires the fingers after an hour.
heavy / light action of an instrument
Trainers admired the easy action of the brown horse as it crossed the field.
Coach Lin filmed the action of each swimmer's legs to spot small mistakes.
The watchmaker cleaned every spring inside the clock until its action was silent again.
文法句型
the action of [body part / machine]
用法筆記
Subject is typically a body part of an athlete or animal, or the working parts inside a machine or musical instrument. Distinguish from sense 3 (a single physical movement) — sense 10 is the overall manner of movement, not one isolated motion.
常見錯誤
11. a case heard before a judge, where one person or company asks the court to punis
a case heard before a judge, where one person or company asks the court to punish another party, force them to stop something, or order compensation for harm already caused.
Two former employees brought an action against the bank for unfair dismissal last month.
bring an action against [defendant]
Mrs Halevi is taking legal action to stop her neighbour cutting down the old oak.
take legal action to + verb
The newspaper faced a libel action after publishing photos of the singer's home.
If the company refuses to pay, our lawyer will file an action in the district court.
The class action against the carmaker involved more than two thousand drivers.
- lawsuit
everyday equivalent; very common in American English
- case
broader; covers both civil and criminal matters
- proceedings
formal; the whole legal process, not just one suit
文法句型
bring an action against [someone]
take legal action
用法筆記
Frequently appears in fixed legal phrases: 'bring an action', 'take legal action', 'class action', 'civil action'. Always concerns courts and judges; for general 'doing something' meanings use sense 1 instead.
常見錯誤
12. all the events that happen one after another in a novel, play, or film, taken to
all the events that happen one after another in a novel, play, or film, taken together as the storyline that the audience follows from start to finish.
The action of the novel takes place in a small fishing village in 1923.
the action takes place in [setting]
Most of the action happens during one long summer afternoon at the lake.
the action happens during [time]
Director Park keeps the action moving quickly so the audience never feels bored.
The action of the play shifts from a quiet farmhouse to a busy courtroom.
Readers may feel lost because the action jumps between three different time periods.
文法句型
the action of [story / film]
the action takes place
用法筆記
Usually preceded by 'the' and treated as singular: 'the action takes place'. Distinguish from sense 5 (action film as a genre) and sense 4 (real-life excitement) — sense 12 is the internal events of a fictional plot.