From Middle English yesternyght, yisternight, from Old English ġiestranniht (“yesternight”), equivalent to yester- + night.
yesternight (not comparable)
- (archaic) Last night.
1611, King James Version of the Bible, Genesis 31:29:
It is in the power of my hand to do you hurt: but the God of your father spake unto me yesternight, saying, Take thou heed that thou speak not to Jacob either good or bad.
1820, Walter Scott, chapter 6, in Ivanhoe:
[…] when the Templar crossed the hall yesternight, he spoke to his Mussulman slaves in the Saracen language, which I well understand, and charged them this morning to watch the journey of the Jew […]
1847, Emily Brontë, chapter 29, in Wuthering Heights:
[…] she has disturbed me, night and day, through eighteen years—incessantly—remorselessly—till yesternight; and yesternight I was tranquil.
yesternight (plural yesternights)
- (archaic) A preceding night.