Antonyms of adj extant

1 sense of extant

Sense 1
extant (vs. extinct) -- (still in existence; not extinct or destroyed or lost; "extant manuscripts"; "specimens of graphic art found among extant barbaric folk"- Edward Clodd)

extinct (vs. extant), nonextant -- (no longer in existence; lost or especially having died out leaving no living representatives; "an extinct species of fish"; "an extinct royal family"; "extinct laws and customs")
        => dead -- (not surviving in active use; "Latin is a dead language")

Similarity of adj extant

1 sense of extant

Sense 1
extant (vs. extinct) -- (still in existence; not extinct or destroyed or lost; "extant manuscripts"; "specimens of graphic art found among extant barbaric folk"- Edward Clodd)
       => living -- (still in active use; "a living language")
       => surviving, living -- (still in existence; "the Wollemi pine found in Australia is a surviving specimen of a conifer thought to have been long extinct and therefore known as a living fossil"; "the only surviving frontier blockhouse in Pennsylvania")
          Also See-> existent#1, existing#2