What does "late-night" mean?

Of, or related to the late night time.

What is a synonym for "late-night"?

Common synonyms include: midnight, redeye.

adj

adj ·2 syllables ·Rare ·Advanced level

Adjective

1
Of, or related to the late night time. not-comparable
"He became a director of weekend late-night programming."

"Tom is in the kitchen, having a late-night snack."

From late + night.