look in on

English

Verb

look in on (third-person singular simple present looks in on, present participle looking in on, simple past and past participle looked in on)

1. To check that (someone or something) is okay or that a process is continuing appropriately; to check up on; to monitor (someone) through brief, often surreptitious checks.
   • 1960 July 11, Harper Lee, To Kill a Mockingbird, Philadelphia, Pa.; New York, N.Y.: J[oshua] B[allinger] Lippincott Company, →OCLC:

     Atticus would flee to his office directly after dinner, where if we sometimes looked in on him, we would find him sitting back in his swivel chair reading.