adjective
1. : lasting throughout an entire night
an all-night sitting of the House of Commons
an all-night card game
2. : open throughout the night
an all-night lunch counter
adjective
1. : lasting throughout an entire night
an all-night sitting of the House of Commons
an all-night card game
2. : open throughout the night
an all-night lunch counter
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012