sign out verb 4sign-out noun 1forms 4 verb4 •To sign one's name as an indication that one is leaving some location; to take some action to indicate one is leaving a secured program or web page on a computer.He was the last person to sign out of the building that night.After making the necessary edits, always sign out of the system. •To remove (something) and take (it) into one's possession, having registered or signed for it in some way as a record of possession and a promise to return it (e.g., by your signature or log-in credentials).If you want to take a book home from the library, you must sign it out.To sign out a book, you must present your library card to the clerk. •To signal. •To say something through sign language. sign-out noun1 •An instance of signing out; a procedure executed when exiting a facility, ending a computer session, etc. formssigned out · signing out · signs out · sign-outs
