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Adverb: yesternight  'yes-tu(r),nIt
Usage: archaic
  1. Last night; during the night just past
    "Yesternight, I dreamt a strange dream"
Noun: yesternight  'yes-tu(r),nIt
Usage: archaic
  1. Last night; the night before today
    "I dreamt a strange dream yesternight"

Derived forms: yesternights