signing in

Verb

sign in (third-person singular simple present signs in, present participle signing in, simple past and past participle signed in)

1. (idiomatic) To sign one's name on a list when entering a place, to indicate one's arrival.
   • In order to get into the office after hours, you'll have to sign in at the security desk.
2. To take some action to access a secured program or web page on a computer; to log in.
   • He signed in using his own cybername: Point Guard.1999, Jacqueline Guest, Triple Threat