The Collaborative International Dictionary
Yesternight \Yes"ter*night`\, n. The last night; the night last past.
Yesternight \Yes"ter*night`\, adv. [AS. gystran niht. See
Yesterday.]
On the last night.
--B. Jonson.
Douglas Harper's Etymology Dictionary
Wiktionary
adv. (context archaic English) last night. n. (cx archaic English) A preceding night.
Usage examples of "yesternight".
French rondel, or reading the Gestes de Doon de Mayence, as I found her yesternight, pretending sleep, the artful, with the corner of the scroll thrusting forth from under her pillow.
Whereunto the drowsie Hostler half asleepe, and turning on the other side, answered, What know I whether you have murthered your Companion whom you brought in yesternight, or no, and now seeke the means to escape away?
Remember the Oracle of Apollo, who pronounced that thou shouldest he married to a dire and fierce Serpent, and many of the Inhabitants hereby, and such as hunt about in the countrey, affirme that thev saw him yesternight returning from pasture and swimming over the River, whereby they doe undoubtedly say, that hee will not pamper thee long with delicate meats, but when the time of delivery shall approach he will devoure both thee and thy child : wherefore advise thy selfe whether thou wilt agree unto us that are carefull of thy safety, and so avoid the perill of death, bee contented to live with thy sisters, or whether thou remaine with the Serpent arid in the end be swallowed into the gulfe of his body.
Whereunto the drowsie Hostler half asleepe, and turning on the other side, answered, What know I whether you have murthered your Companion whom you brought in yesternight, or no, and now seeke the means to escape away?