Definition of immature:
formative, untested, youngish, childly, pupal, half-grown, teenage, teen, fledgeless, preadolescent, youth, fleeceable, little, unvaned, inchoative, green, baby, babyish, early, preteen, untried, juvenile, infantile, larval, vernal, schoolgirlish, unripe, infant, light-green, unseasoned, dark-green, puppylike, greenish, adolescent, boylike, pubescent, unaged, unripened, teenaged, prepupal, new, puerile, small, inexperienced, childish, unsophisticated, youthful, embryonic, vulnerable, unfeathered, prepubertal, sophomoric, underdeveloped, embryonal, gullible, undeveloped, boyish, jejune, callow, schoolboyish, puppyish, naive, newborn, girlish, junior, prepubescent, fledgling, unfledged, unformed, tender, childlike.
- adolescent (part of speech: adjective)
- juvenile (part of speech: adjective)
- young (part of speech: adjective)
- incomplete (part of speech: adjective)
The only foxes observed by our field parties were two seen in July of 1970- one an immature animal held captive in Camp Crook and remains of another that had been killed on a county road about 18 miles north of that place.- "Mammals of Northwestern South Dakota", Kenneth W. Andersen.
She had an odd sense, too, of being young and immature, and as though he had stooped to her from some height: such as thirty- two years and being in the war, and having to decide about life and death, and so on.- "The Breaking Point", Mary Roberts Rinehart.
- "Tobacco; Its History, Varieties, Culture, Manufacture and Commerce", E. R. Billings.