Definition of spontaneously in English:



  • 1As a result of a sudden impulse and without premeditation.

    ‘the crowd spontaneously burst into song’
    • ‘At many of these events, advanced students spontaneously improvise solos or duets based on a theme given by audience members.’
    • ‘Later, more spontaneously, he mentions the impact of Eisenstein.’
    • ‘Rohmer's characters are thinkers and are not inclined to act spontaneously.’
    • ‘Their mean-spirited classmates end up clapping spontaneously as the boys beat all the odds.’
    • ‘Monet's works are small, informal in composition, freely and spontaneously painted, showing everyday scenes treated in bright colour.’
    without being asked, of one's own accord, voluntarily, on impulse, impulsively, on the spur of the moment, extempore, extemporaneously
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    1. 1.1 Without apparent external cause or stimulus.
      ‘a surprising number of early pregnancies spontaneously abort’
      ‘mutations can occur spontaneously’
      • ‘The dehydration step occurs spontaneously under acid conditions.’
      • ‘Toughened glass is very strong, but has been known to fracture spontaneously due to nickel sulphide inclusions.’
      • ‘When mesmeric patients awake spontaneously, they continually ascribe their waking to their first sensation, or even to something imagined.’
      • ‘A large number of infections disappear spontaneously without any treatment.’
      • ‘It's pyrophoric, meaning that it can spontaneously combust with a little bit of oxygen and some heat.’
      without thinking, automatically, unthinkingly, involuntarily, instinctively
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