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English definition of “once”

once

adverb (PAST)    /wʌns/
B1 in the past, but not now: This house once belonged to my grandfather . Computers are much cheaper nowadays than they once were. Once-thriving villages stand deserted and in ruins .In the past Grammar:OnceOnce is an adverb or conjunction.Grammar:Once as an adverbWe use once as an adverb to mean ‘one single time’:Grammar:Once as a conjunctionWe use once as a conjunction meaning ‘as soon as’ or ‘after’:
(Definition of once adverb (PAST) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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