Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Late Latin
Origin: spontaneus, from Latin sponte 'of your own free will'

spontaneous

adjective
     
spon‧ta‧ne‧ous
1 something that is spontaneous has not been planned or organized, but happens by itself, or because you suddenly feel you want to do it:
The crowd gave a spontaneous cheer.
My spontaneous reaction was to run away.
2 someone who is spontaneous does things without planning them first - used to show approval
spontaneously adverb:
She laughed spontaneously.
spontaneity noun [uncountable]

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