yesternight

yes·ter·night

Y0019400 (yĕs′tər-nīt′)n. Last night.
yes′ter·night′ adv.

yesternight

(ˌjɛstəˈnaɪt) advarchaic yesterday night

yes•ter•night

(ˈyɛs tərˈnaɪt)
Archaic. n. 1. last night. adv. 2. during last night. [before 900]