Definition of preexistent in US English:

preexistent

adjective

  • Existing at or from an earlier time.

    ‘these drugs must be used with care in patients with preexistent heart disease’
    ‘our critics have preexistent convictions’

Pronunciation

preexistent

/ˌpriɪɡˈzɪst(ə)nt//ˌprēiɡˈzist(ə)nt/