Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun check_in

1 sense of check-in

Sense 1
check-in -- (the act of reporting your presence (as at an airport or a hotel))
       => arrival -- (the act of arriving at a certain place; "they awaited her arrival")

Antonyms of verb check_in

1 sense of check in

Sense 1
check in, sign in -- (announce one's arrival, e.g. at hotels or airports)
       Antonym of check out (Sense 2)
      => check out -- (announce one's departure from a hotel)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb check_in

1 sense of check in

Sense 1
check in, sign in -- (announce one's arrival, e.g. at hotels or airports)
       => report -- (announce one's presence; "I report to work every day at 9 o'clock")