immature

adj 1: characteristic of a lack of maturity; "immature behavior"

[ant: {mature}]

2: lacking in development; "immature plans"; "an unformed

character" [syn: {unformed}]

3: (used of living things especially persons) in an early

period of life or development or growth; "young people"

[syn: {young}] [ant: {old}]

4: not fully developed or mature; "unripe fruit"; "fried green

tomatoes" [syn: {green}, {unripe}, {unripened}] [ant: {ripe}]

5: not yet mature [ant: {mature}]

6: (of birds) not yet having developed feathers; "a small

unfledged sparrow on the window sill" [syn: {unfledged}]

[ant: {fledged}]