immature

IMMATU'RE, a. [L. immaturus; in and maturus.]

1. Not mature or ripe; unripe; that has not arrived to a perfect state; applied to fruit.

2. Not perfect; not brought to a complete state; as immature plans or counsels.

3. Hasty; too early; that comes before the natural time.

[In this sense, premature is generally used.]