Definition of spontaneous in English:

spontaneous

Line breaks: spon|tan¦eous
Pronunciation: /spɒnˈteɪnɪəs
 
/

adjective

Derivatives

spontaneously

adverb
More example sentences
  • Spectators then sit back and watch the group spontaneously create characters and a storyline springing from the impromptu location.
  • The set-up at the hotel was ad hoc and decisions were made spontaneously as to how business should be conducted.
  • Yet during the actual shooting, I still allow the actors the freedom to react spontaneously to the content of the scene.
Synonyms
without being asked, of one's own accord, voluntarily, on impulse, impulsively, on the spur of the moment, extempore, extemporaneously
informal off the cuff
without thinking, automatically, unthinkingly, involuntarily, instinctively

Origin

mid 17th century: from late Latin spontaneus (from (sua) sponte 'of (one's) own accord') + -ous.

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