immatureadjective
uk/ˌɪm.əˈtʃʊər/us/ˌɪm.əˈtʊr/C2 disapproving not behaving in a way that is as calm and wise as people expect from someone of your age:
Stop being so silly and immature, Chris!
She's rather immature for her age, don't you think?
disapproving not having much experience of something:
politically immature
specialized biology not yet completely grown or developed:
While the animals are still immature, they do not breed.
Thesaurus: synonyms and related words
Physically and mentally mature & immature
- adult
- ageing
- aging
- an old/a wise head on young shoulders idiom
- babyish
- grown
- grown up
- head
- infantile
- juvenile
- make a man (out) of sb idiom
- mature
- maturity
- overgrown
- petulant
- precocious
- precociously
- puerile
- retarded
- young
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immaturity
noun [ U ] uk/ˌɪm.əˈtʃʊə.rə.ti/us/ˌɪm.əˈtʊr.ə.t̬i/
physical/emotional immaturity