Definition of immature in US English:

immature

adjective

  • 1Not fully developed.

    ‘many of the fish caught are immature’
    ‘immature fruit’
    • ‘The mottled brown raptors I saw on the sixth are indeed immature Brahminy Kites.’
    • ‘For example, experiments conducted with tomato indicate that immature fruits do not ripen in response to exogenous ethylene.’
    • ‘The ovule is an immature seed, which does not yet contain a viable embryo.’
    • ‘Because this is kind of what an immature Bald Eagle would look like if you're looking at one.’
    • ‘Drugs that are effective against the immature and early immature stages should be used at this time of the year.’
    • ‘Some of the solo voices are a bit immature but the choral singing does immense credit to the conductor and his young team.’
    • ‘Our results suggest that immature birds try to increase fat stores by increasing time available for foraging at stopover sites.’
    • ‘The reticulocyte count measures the number of immature red blood cells being produced.’
    • ‘In that eggplant does not experience a marked ripening stage like tomato and pepper, immature and mature fruit were compared.’
    • ‘The olives, having done pretty well last year, have shed all their immature fruit.’
    • ‘Among immature males, those obtained from the wild also clustered together.’
    • ‘They hunt for food at night, live alone and are sometimes found in small groups of adults with immature offspring.’
    • ‘I discovered three of them eating the immature fruits in the tree's spreading crown.’
    • ‘The fruit looks like immature plums, and each variety has its own harvesting schedule.’
    • ‘My only explanation if there wasn't a mix-up is that immature birds have much shorter beaks than their parents.’
    • ‘They are either feasting on escapes of immature farmed fish or on the uneaten feed pellets that accumulate in the water below the cages.’
    • ‘I ate my first immature pea pod of the year, straight off the plant.’
    • ‘Sexually immature and drab colored juveniles represent the first phase.’
    • ‘Safety considerations are more important in children because children are physically and emotionally immature.’
    • ‘Seeds were harvested at 40 days after flowering and immature seeds were removed.’
    unripe, not ripe, not mature, not matured, unmellowed
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    1. 1.1 Having or showing an emotional or intellectual development appropriate to someone younger.
      ‘his immature sense of humor’
      • ‘Callie knew she was acting a little immature, but she didn't care.’
      • ‘Thirdly, there is no need to engage in childish name calling or immature ranting.’
      • ‘The boys you know seem particularly immature for treating you like you're inferior.’
      • ‘She had her immature, childish moments, but there were times when she acted twice her age.’
      • ‘To do otherwise would be as childish and immature as my behaviour in the first place.’
      • ‘When I read back over this opinion I realise how immature I was then.’
      • ‘But, my evaluation of her was that she was rather immature and seeking attention.’
      • ‘Then again I did ask for it I called someone an emotionally immature moron.’
      • ‘All the guys were immature or just plain weird.’
      • ‘No matter how mature or immature I was at any given point, it would not have shaken that belief.’
      • ‘If you think finance dictates social dynamics then you are immature and naive.’
      • ‘Going out with someone is a big deal and I find that a bit immature.’
      • ‘Some lecturers say the students are immature, unsophisticated and do not know what they want in class.’
      • ‘I think this woman sounds extremely naive, immature and unintelligent on the matter.’
      • ‘He is annoying and a bit immature for his age, but that's okay.’
      • ‘We had been reassured by professionals he was just immature, so we expected him to gain employment and become independent.’
      • ‘He's still a bit immature, but also just 20 years old.’
      • ‘I could hear people calling me immature but I never cared.’
      • ‘Pardon me for saying this, but people who talk like that strike me as horribly immature.’
      • ‘I think that maybe you might be more mature than the boys you know and you just don't like immature guys.’
      childish, babyish, infantile, juvenile, puerile, jejune, callow, green, inexperienced, unsophisticated, unworldly, naive, ingenuous
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Origin

Mid 16th century (in the sense ‘premature’, referring to death): from Latin immaturus ‘untimely, unripe’, from in- ‘not’ + maturus ‘ripe’ (see mature).

Pronunciation