Yestreen

Origin

From Middle English, alteration of yestereven ("last night, yesterday evening"), from Old English ġiestranǣfen ("yesterday evening"), equivalent to - + e'en("evening").

Full definition of yestreen

Noun

1. (chiefly archaic) The night before; yesterday evening; yesternight; last night.
• 1960: You have not forgotten our telephone conversation of yestreen, Jeeves? (P. G. Wodehouse, Jeeves in the Offing, chapter XI)

Usage notes

The word is usually regarded as archaic, but is occasionally seen in poetic usage, or in Scottish.