immature

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

Synonyms

young unripe unripened green unfledged

Antonyms

mature old ripe fledged

See also

junior new premature young

Words of close approximity

immaturely immatureness