Boland is an immature kid with a lean, unsmiling face, ice-blue eyes, and wavy blond hair.
Log line: A no-nonsense new captain at a Brooklyn police precinct forces an immature but brilliant detective to grow up.
Margene has often seemed the most immature of Bill's three wives, little more than a child herself.
They are small and immature, as all human beings once were, but they are human individuals.
Americans are terrified of death, and often demonstrate an immature refusal to accept it.
The most immature essay must be more than a summary; a mere summary is never an essay.
And none but calves the most immature can possibly sympathize with him.
A man is bound above all things to protect those who depend on him from his own immature or revocable impulses.
That is abortive that is untimely, that has not been borne its full time, that is immature.
The Oriental mind is an old, old mind, richly stored with experience and memories,—not in the least gullible and immature.
1540s, "untimely, premature," from Latin immaturus "untimely, unripe," from assimilated form of in- "not, opposite of" (see in- (1)) + maturus (see mature (v.)). In 16c., usually in reference to early death; modern sense of "not fully developed" first recorded 1640s. In reference to mentalities or behaviors not considered age-appropriate, from 1920.
immature im·ma·ture (ĭm'ə-tyur', -tur', -chur')
Not fully grown or developed.