late night

• (US) IPA^(key): /ˌleɪt ˈnaɪt/, (television) /ˈleɪt ˌnaɪt/

late night (plural late nights)

1. A night when someone goes to bed later than usual.

   Antonym: early night

   I’ve had too many late nights this week, I'm exhausted.

   A worry that nags into the late night hours.

2. Late-night television programming.
   • 2025 September 19, Judy Berman, “Jimmy Fallon Is Playing It Safe. He Might Be Cooked Anyway”, in TIME‎^[1], archived from the original on 22 September 2025:

     Fallon is known for being late night’s most lighthearted personality, but still, there was an unmistakable undertone of avoidance in his performance on Thursday.

Shortening of late night show, from English late night show.

• IPA^(key): /ˌleid ˈnait/ [ˌlei̯ð̞ ˈnai̯t̪]

late night m (plural late nights)

1. (television) late-night show

   Synonym: late night show