unextinct verb 2adjective 1forms 3 verb2 •To make not extinct; especially, to return an extinct species to existence.Removing graffiti. Unextincting the dodo bird. — 2007 •To correct, or otherwise account for the extinction of an astronomical object. adjective1 •Not extinct; still living.There was only one person in the village who had actually known Luella Miller. That person was a woman well over eighty, but a marvel of vitality and unextinct youth. — 1902 formsunextincted · unextincting · unextincts