immature (
http://definr.com/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; not ripe; "unripe fruit";
"fried green tomatoes"; "green wood" [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]