1. [ adjective ] characteristic of a lack of maturity

"immature behavior"

Related terms: mature childish callow babyish adolescent
2. [ adjective ] lacking in development
Synonyms: unformed

"immature plans" "an unformed character"

Related terms: undeveloped
3. [ adjective ] not fully developed or mature; not ripe;
Synonyms: unripe unripened green

"unripe fruit" "fried green tomatoes" "green wood"

Related terms: ripe unaged
4. [ adjective ] not yet mature
Related terms: mature pubescent larval prepubescent prepupal pupal embryonic underdeveloped adolescent unformed embryologic formative young premature age maturity
5. [ adjective ] (used of living things especially persons) in an early period of life or development or growth
Synonyms: young

"young people"

Related terms: old life_form little youthful adolescent early girlish newborn boyish tender childlike youngish puppyish preadolescent formative baby junior new junior age
6. [ adjective ] (of birds) not yet having developed feathers
Synonyms: unfledged

"a small unfledged sparrow on the window sill"

Related terms: fledged unfeathered
Similar spelling:   immaturely