Antonyms of adj preexistent

1 sense of preexistent

Sense 1
preexistent, pre-existent, preexisting, pre-existing -- (existing previously or before something; "variations on pre-existent musical themes")

INDIRECT (VIA antecedent) -> subsequent -- (following in time or order; "subsequent developments")

Similarity of adj preexistent

1 sense of preexistent

Sense 1
preexistent, pre-existent, preexisting, pre-existing -- (existing previously or before something; "variations on pre-existent musical themes")
       => antecedent (vs. subsequent) -- (preceding in time or order)