check in

verb

announce one's arrival, e.g. at hotels or airports (Freq. 3)

• Syn: ↑sign in

• Ant: ↑check out

• Derivationally related forms: ↑check-in

• Hypernyms: ↑report

• Verb Frames:

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Somebody ——s

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Somebody ——s somebody

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Somebody ——s PP

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check in (or check someone in)

arrive and register at a hotel or airport

you must check in at least one hour before takeoff | they check in the passengers

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check in [phrasal verb]

1 : to report to someone when you arrive at a place (such as an airport or convention) to let them know you are there

Passengers must check in one hour before the flight leaves.

Where do I have to check in?

especially : to arrive at and be given a room in a hotel, motel, etc.

check in [=register] at a hotel

Guests cannot check in before 4:00 PM.

— see also ↑check-in

2 US, informal : to talk with someone in order to report or find out new information

I'm just checking in to see how things are going.

— usually + with

I have to go to a meeting now, but I'll check in with you later.

3 check (something) in or check in (something) : to leave or take bags, suitcases, etc., so that they can be loaded onto a plane or train

We checked our bags in at the station.

The airline checked in our luggage.

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Main Entry: ↑check