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Adjective: immature  ,i-mu't(y)ûr or ,i-mu'chûr
  1. Characteristic of a lack of maturity
    "immature behaviour"
     
  2. (used of living things especially persons) in an early period of life, development or growth
    "immature people";
    - young
     
  3. Not fully developed or mature; not ripe
    "fried immature tomatoes";
    - green, unripe, unripened
     
  4. Not yet adult
     
  5. (of birds) not yet having developed feathers
    "a small immature sparrow on the window sill";
    - unfledged

See also: adolescent, age, babyish, boyish, boylike, childish, childlike, childly, early, embryologic, embryonal, embryonic, five-year-old, four-year-old, girlish, inceptive, inchoative, infantile, jejune, junior, juvenile, larval, little, matureness, maturity, new, newborn, one-year-old, preadolescent, premature, prepubertal, prepubescent, prepupal, preteen, pubescent, puerile, pupal, puppyish, puppylike, schoolboyish, schoolgirlish, small, teen, teenage, teenaged, tender, three-year-old, two-year-old, unaged, underdeveloped, unfeathered, vernal, wet behind the ears, young, youngish, youthful

Antonym: mature

Encyclopedia: Immature