MEANING: noun: Last night.
adverb: During last night.

ETYMOLOGY: From Old English giestran/gierstan (a time one period prior to the present period) + niht (night). Earliest documented use: c. 450. A related word is yestreen (yesterday evening).

OYESTER NIGHT - ...and if we have enough of them this evening, we might even find a pearl or two

YES, HER NIGHT - everyone agrees, at the debutante's Ball

YE STERN EIGHT - one short of a Puritan jury