immature

英[,ɪmə'tjʊə;,ɪmə'tjɔː] 美[,ɪmə'tʃʊr]

1. characteristic of a lack of maturity;

"immature behavior"

2. lacking in development;

"immature plans"

"an unformed character"

3. (used of living things especially persons) in an early period of life or development or growth;

"young people"

4. not fully developed or mature; not ripe;

"unripe fruit"

"fried green tomatoes"

"green wood"

5. not yet mature

6. (of birds) not yet having developed feathers;

"a small unfledged sparrow on the window sill"