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(a.) Going before in time; being or happening before something else; antecedent; prior; as, previous arrangements; a previous illness.

Thesaurus Entries

a bit previous, above, advanced, aforementioned, aforesaid, ahead, ancient, ante, antecedent, anterior, anticipatory, before, beforehand, ci-devant, earlier, early, elder, erstwhile, far ahead, first, fore, foregoing, former, forward, half-baked, half-cocked, hasty, ill-considered, immemorial, impulsive, in advance, late, not firm, old, olden, older, once, onetime, overhasty, oversoon, past, precedent, preceding, precipitate, precocious, precurrent, preexistent, prehistoric, premature, previous to, prime, primeval, primitive, prior, prior to, quondam, recent, rushed, senior, sometime, soon, then, too early, too soon, uncrystallized, unjelled, unmatured, unmeditated, unpremeditated, unprepared, unripe, untimely, whilom