spontaneous

[ spon-tey-nee-uhs ]
/ spɒnˈteɪ ni əs /

adjective

coming or resulting from a natural impulse or tendency; without effort or premeditation; natural and unconstrained; unplanned: a spontaneous burst of applause.
(of a person) given to acting upon sudden impulses.
(of natural phenomena) arising from internal forces or causes; independent of external agencies; self-acting.
growing naturally or without cultivation, as plants and fruits; indigenous.
produced by natural process.

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Origin of spontaneous

1650–60; < Late Latin spontāneus, equivalent to Latin spont(e) willingly + -āneus (-ān(us) -an + -eus -eous)

synonym study for spontaneous

OTHER WORDS FROM spontaneous

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for spontaneous

British Dictionary definitions for spontaneous

spontaneous
/ (spɒnˈteɪnɪəs) /

adjective

occurring, produced, or performed through natural processes without external influencespontaneous movement
arising from an unforced personal impulse; voluntary; unpremeditateda spontaneous comment
(of plants) growing naturally; indigenous

Derived forms of spontaneous

spontaneously, adverbspontaneousness, noun

Word Origin for spontaneous

C17: from Late Latin spontāneus, from Latin sponte voluntarily
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012