Definitions from Wiktionary (check in)

▸ verb:  To announce or record one's own arrival at a hotel, airport etc.
▸ verb:  To verify a person's information and record their arrival, such as at a hotel, airport, etc.
▸ verb:  To contact another person in order to keep the other person informed of one's situation.
▸ verb:  (transitive) To return (a book to a library, source code to a repository, etc.).
▸ verb:  To visit in order to see how someone is doing.
▸ verb:  (intransitive, prison slang) To enter solitary confinement at one's own request for protection from other prisoners.
▸ verb:  (transitive, prison slang) To send somebody to solitary confinement; to make somebody be admitted to solitary confinement.
▸ verb:  (software) To integrate new revisions into the public or master version of a file in a version control system.
▸ Also see check_in

---

▸ Words similar to check ins
▸ Usage examples for check ins

▸ Idioms related to check ins
▸ Wikipedia articles (New!)
▸ Words that often appear near check ins
▸ Rhymes of check ins

▸ Invented words related to check ins