Definition of unpredictable in English:



  • 1Not able to be predicted.

    ‘the unpredictable weather of the Scottish islands’
    • ‘You wouldn't put a half-time change of manager past this unpredictable Hearts regime.’
    • ‘Conduction of atrial impulses to the ventricles is variable and unpredictable.’
    • ‘As is so often the case in this job, I'm trying to predict the unpredictable and plan for the unknown.’
    • ‘Every year the weather is most unpredictable for this event and this year's was no exception.’
    • ‘The unpredictable aspect of political warfare - future events - may change all that.’
    • ‘They moved down the pipe and shifted in mostly unstable, unpredictable ways.’
    • ‘We need to reset the variables excluding anything unpredictable and run the script once again.’
    • ‘People who want to think ahead need to recognise that the world predictably changes in unpredictable ways.’
    • ‘Then the weather started to change, Andalucia seems almost as unpredictable as Yorkshire.’
    • ‘With the weather so unpredictable I spent a lot of Saturday in the kitchen.’
    • ‘With the region's unpredictable weather conditions, the team is hopeful of an exciting race.’
    • ‘In addition, an unpredictable change in franchise agreements in the summer could delay the work even further.’
    • ‘Make sure you pack a few warm clothes in your hand luggage as you know how unpredictable English weather can be.’
    • ‘Communication is difficult now because he is both deaf and has an unpredictable temper.’
    • ‘We live in uncertain times when change has never been so rapid or unpredictable.’
    • ‘The brown cloud shows man's activities are making climate change more unpredictable everywhere.’
    • ‘This is a good combination as Aquarius is a wacky, unpredictable sign, but Capricorn is sensible and steady.’
    • ‘The future direction of the Irish property market has become as unpredictable as the weather.’
    • ‘Changeable and unpredictable, it lacks structure, control and conformity.’
    • ‘The weather is unpredictable, ranging from heat and humidity to thunderstorms.’
    unforeseeable, undivinable, incalculable, uncertain, unsure, doubtful, dubious, in the balance, up in the air, random, arbitrary
    erratic, moody, volatile, unstable, fickle, capricious, whimsical, temperamental, mercurial, changeable, variable, inconstant, undependable, unreliable, unmanageable, impulsive
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    1. 1.1 (of a person) behaving in a way that is not easily predicted.
      ‘he is emotional and unpredictable’
      • ‘She was virtually unpredictable, and I suspect it often came down to her mood at any given moment.’
      • ‘The particular seller now finds it fit to train his guns on unpredictable customers.’
      • ‘Patrick Moore is joined by Dr Mark Kidger to discuss comets, the most unpredictable members of the solar system.’
      • ‘As for Mandelson, he is as unpredictable and dangerous as he is brilliant.’
      • ‘He was so unpredictable, Kait found it difficult not to be angry with him most of the time.’
      • ‘He is unpredictable in a way that Hague was not, they say, but this is not intended as a compliment.’
      • ‘But I was very unpredictable for a long time, and it was difficult for my husband.’
      • ‘They are unpredictable and a high percentage have a mental illness.’
      • ‘She's really unpredictable, and she has no qualms about taking things to any length.’
      • ‘Even those who fought alongside him for three decades are baffled by his unpredictable behaviour.’
      • ‘Finally, Judge Brinkema could be an unpredictable player in the Moussaoui trial.’
      • ‘In more recent times, his nastiness has become more unpredictable.’
      • ‘Anyway, Stephanie was so unpredictable, she left him drained and exhausted.’
      • ‘These guys are unpredictable and consequently extremely dangerous to deal with, whether as friend or foe.’
      • ‘And in further interviews her behaviour became more unpredictable.’
      • ‘He is so unpredictable and he was the only guy who managed to make Ian lose his cool.’
      • ‘Dr Gallagher said that by their nature these individuals were unpredictable.’
      • ‘As you move on from here, accept that most people are completely unpredictable.’
      • ‘Our roads are so busy and dangerous and many drivers are extremely unpredictable.’
      • ‘Their nomadic ways made them very unpredictable and deceiving.’