'Preexist' definitions:
Definition of 'preexist'
From: WordNet
verb
Exist beforehand or prior to a certain point in time; "Did this condition pre-exist?"
Definition of 'Preexist'
From: GCIDE
- Preexist \Pre`["e]x*ist"\, v. i. [imp. & p. p. {Pre["e]xisted}; p. pr. & vb. n. {Pre["e]xisting}.] To exist previously; to exist before something else; to exist before the current activity commenced; as, preexisting illnesses are not covered by this insurance policy. [Also spelled pre-exist.] [1913 Webster + WordNet 1.5 + PJC]