from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. yesterday evening
- adv. yesterday evening
from the GNU version of the Collaborative International Dictionary of English
- n. The evening of yesterday; the evening last past.
from The Century Dictionary and Cyclopedia
- n. Same as yestereven.
From Middle English, alteration of yestereven ("last night, yesterday evening"), from Old English ġiestranǣfen ("yesterday evening"), equivalent to yester- + even (“evening”). (Wiktionary)