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