Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Verb: check in
  1. Announce one's arrival, e.g. at hotels or airports
    - sign in
  2. Contact or visit another person in order to keep them informed of one's situation or see how they are
    "My son checks in regularly with me when he's travelling"
Noun: check-in  'chek,in
  1. The act of reporting your presence (as at an airport or a hotel)

Derived forms: check-ins, checked in, checking in, checks in

Type of: arrival, report

Antonym: check out

Encyclopedia: Check in