late at night► late: it's late · Look, it's late and I'm tired - let's talk about this tomorrow.it's getting late · I must go home now, it's getting late.late at night · I don't like coming home late at night to an empty house.stay up late (=not go to bed until late) · They stayed up late to watch the end of the match.have a late night (=when you go to bed very late) · You look as if you've been having too many late nights recently.
► the middle of the night late at night when most people are asleep: · In the middle of the night, I was woken by a loud noise downstairs.· Helen opened the door. "Dave? What's wrong? It's the middle of the night!"
► late-night happening or shown late at night: · They kept us awake with their late-night parties.· late-night television· They stopped off for a late-night drink.
► last thing at night informal just before you go to bed: · The soldiers are supposed to polish their shoes last thing at night.
► the early hours a time which is very late at night, between about 1 o'clock and 4 o'clock in the morning: · The club didn't close till the early hours.the early hours of the morning: · They reached San Francisco in the early hours of the morning.
► till all hours informal until very late at night - use this when you are annoyed by someone doing something too late at night: · She and her friends used to stay out till all hours, going from club to club.· Better not wake her - she was up till all hours last night, working.
happening late at night: 
late-night television