immature Meaning, Definition & Usage

  1. adjective characteristic of a lack of maturity
    • immature behavior
  2. adjective (used of living things especially persons) in an early period of life or development or growth
    young.
    • young people
  3. adjective not fully developed or mature; not ripe
    unripe; green; unripened.
    • unripe fruit
    • fried green tomatoes
    • green wood
  4. adjective not yet mature
  5. adjective (of birds) not yet having developed feathers
    unfledged.
    • a small unfledged sparrow on the window sill

WordNet

Im`ma*ture" adjective
Etymology
L. immaturus; pref. im- not + maturus mature, ripe. See Mature.
Definitions
  1. Not mature; unripe; not arrived at perfection of full development; crude; unfinished; as, immature fruit; immature character; immature plans. "An ill-measured and immature counsel." Bacon.
  2. Premature; untimely; too early; as, an immature death. R. Jer. Taylor.

Webster 1913