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English definition of “prior”

prior

adjective [before noun] (EARLIER)    /praɪər/ US  /praɪr/
C1 formal existing or happening before something else, or before a particular time: The course required no prior knowledge of Spanish. They had to refuse the dinner invitation because of a prior engagement (= something already planned for that time).Before, after and alreadyAfter and behind prior to sth C1 before a particular time or event: the weeks prior to her deathBefore, after and alreadyAfter and behind
(Definition of prior adjective (EARLIER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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