- immature⇄adj. 1. not mature; not ripe; not full-grown; undeveloped. Immature apples are usually green.
2. (Physical Geography.) reduced to only a slight extent by erosion, etc.
3. (Archaic.) premature. - immature⇄adv. immaturely.
- immature⇄immature, adjective, noun.
- immature⇄noun an immature person or animal.
Ex. The number of immatures seems lower than it ought to be to maintain the species (Atlantic). - immature⇄noun immatureness.