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pre-exist

verb [I or T]
 
 
/ˌpriː.ɪɡˈzɪst/ formal

Definition

to exist before something else: Dinosaurs pre-existed human beings by many millions of years.Existing and being pre-existing
 
 
/ˌpriː.ɪɡˈzɪs.tɪŋ/ adjective
a pre-existing medical conditionBefore, after and alreadyAfter and behind
(Definition of pre-exist verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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