check-in
check-in — noun
1. the section of an airport where passengers show their ticket and personal docume
the section of an airport where passengers show their ticket and personal documents before being allowed onto the plane
The queue at the check-in stretched all the way back to the main entrance doors.
Ravi handed his passport to the woman behind the check-in counter at Taipei Airport.
typical collocation: check-in counter / check-in desk
Passengers should arrive at the check-in at least two hours before their flight.
The airline has opened a new check-in area near Gate 12 for international travellers.
- check-in desk
the specific piece of furniture, not the whole area
- check-in counter
more American; similar meaning to desk
文法句型
the check-in
check-in + noun (counter, desk, area)
用法筆記
Frequently used as a noun modifier before another noun (check-in counter, check-in desk, check-in area).
常見錯誤
2. the process of registering your arrival at a hotel, airport, or event by giving
the process of registering your arrival at a hotel, airport, or event by giving your personal details to the staff
Online check-in saves time because you can skip the queues at the airport.
collocation: online check-in
Hotel check-in is usually at three o'clock in the afternoon.
noun modifier: hotel check-in
The clinic offered a quick check-in on a tablet for patients arriving for their appointments.
Beatriz completed the check-in for her flight while she was still at home.
- registration
more formal, used for conferences and official events
- booking-in
less common, mainly British
- checkout
the process of leaving a hotel
文法句型
check-in for [flight/event]
online check-in
[hotel/airport] check-in
用法筆記
Often appears with a preceding noun specifying the type (hotel check-in, airport check-in, online check-in). The uncountable use refers to the activity in general; the countable use (a check-in) refers to a single instance.
常見錯誤
check-in — phrasal verb
1. to go to the front desk of a hotel, the airport counter, or a similar place and
to go to the front desk of a hotel, the airport counter, or a similar place and let the staff know you are present
Theo checked in at the hotel and asked for an ocean-view room.
check in at [location]
All passengers must check in at least forty minutes before the plane departs.
Aiko and her family checked in for their flight to Tokyo early in the morning.
The tour guide told everyone to check in at the hotel lobby before dinner.
- check out
to leave a hotel or pay your bill
文法句型
check in at [hotel/airport]
check in for [flight/event]
用法筆記
The particle 'in' is not separated from the verb when the verb is used intransitively. The phrase is NOT hyphenated when used as a verb (write 'check in', not 'check-in').
常見錯誤
2. to give your suitcases or luggage to a member of staff so they can be loaded ont
to give your suitcases or luggage to a member of staff so they can be loaded onto an aeroplane, train, or ship
We checked our bags in at the counter and walked to the departure gate.
separable: check [object] in
You can check your heavy suitcase in at the desk and keep a small bag.
check [object] in — object between verb and particle
The passenger checked in two large suitcases and kept a backpack as hand luggage.
Please check your bags in at least thirty minutes before the train departs.
- hand over luggage
describes the action literally
- drop off baggage
less formal, common in travel announcements
- collect
to pick up your bags after the journey
文法句型
check [luggage/noun] in
check in [luggage/noun]
用法筆記
This sense is transitive and separable — the object can go either between 'check' and 'in' or after 'check in'. For short objects (it, them), the mid-position is preferred: 'check it in', not 'check in it'.
常見錯誤
check-in — verb
1. to arrive at a hotel, workplace, appointment, or event and officially record you
to arrive at a hotel, workplace, appointment, or event and officially record your presence by giving your name or details
Guests must check in at the main reception desk before going up to their rooms.
check in at [desk/reception]
Yusuf checked in for his dental appointment and sat in the waiting room.
New staff need to check in with the human resources office on their first day.
The conference app lets attendees check in by scanning a QR code at the entrance.
文法句型
check in at [place]
check in with [person/office]
check in for [event]
用法筆記
Distinguish from the phrasal verb at sense 1: this verb sense is broader and covers any kind of presence-reporting (hotels, workplaces, appointments, events), whereas the phrasal verb at sense 1 focuses specifically on travel locations (hotels, airports).
常見錯誤
2. to contact someone or look into a situation regularly to make sure that everythi
to contact someone or look into a situation regularly to make sure that everything is going well — for example, a manager asking team members about their progress, or a relative calling to see if an older person is safe
The manager checks in with each team member every morning about their work.
check in with [someone] — status update
Leila promised to check in on her elderly neighbour during the heatwave.
check in on [someone] — welfare check
The nurse will check in later this evening to see how you are recovering.
Parents check in with their children by phone when the kids are at summer camp.
- touch base with
informal, used in workplace settings
- reach out to
emphasises initiating contact, often for support
- follow up with
implies a previous conversation or action that you are returning to
- lose touch with
to stop communicating with someone
文法句型
check in with [someone]
check in on [someone/something]
check in to [do something]
用法筆記
Frequently followed by 'with' (for people) or 'on' (for people or situations). 'Check in on' implies a welfare or safety concern; 'check in with' implies a routine status update.
常見錯誤
❌ 'I checked on my friend yesterday to see how her project was going.' — This is acceptable but 'checked in with' is more accurate for routine updates. Use 'check in with' for progress reports and 'check in on' for safety/health concerns.