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spontaneous

[spon-tey-nee-uh s] /spɒnˈteɪ ni əs/
adjective
1.
coming or resulting from a natural impulse or tendency; without effort or premeditation; natural and unconstrained; unplanned:
a spontaneous burst of applause.
2.
(of a person) given to acting upon sudden impulses.
3.
(of natural phenomena) arising from internal forces or causes; independent of external agencies; self-acting.
4.
growing naturally or without cultivation, as plants and fruits; indigenous.
5.
produced by natural process.
Origin of spontaneous
1650-1660
1650-60; < Late Latin spontāneus, equivalent to Latin spont(e) willingly + -āneus (-ān(us) -an + -eus -eous)
Related forms
spontaneously, adverb
spontaneousness, noun
nonspontaneous, adjective
nonspontaneously, adverb
nonspontaneousness, noun
semispontaneous, adjective
semispontaneously, adverb
semispontaneousness, noun
subspontaneous, adjective
subspontaneously, adverb
subspontaneousness, noun
unspontaneous, adjective
unspontaneously, adverb
unspontaneousness, noun
Synonyms
1. unpremeditated, free. See automatic, voluntary.
Antonyms
1. premeditated.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for spontaneously
Contemporary Examples
Historical Examples
  • In her this appetite is developed much less often spontaneously than in him, and where it is so, it is generally later.

    The Sexual Question August Forel
  • Here all the varieties of his studies come into play, as it were, spontaneously.

  • But it has been certainly proved that these organisms are not spontaneously produced in the water or organic fluid.

  • I offer the suggestion generously, freely, and spontaneously.

    Nuts and Nutcrackers Charles James Lever
  • It followed that everybody was reluctantly compelled to pay the higher price which the American spontaneously elected to give.

    The Philippine Islands John Foreman
British Dictionary definitions for spontaneously

spontaneous

/spɒnˈteɪnɪəs/
adjective
1.
occurring, produced, or performed through natural processes without external influence: spontaneous movement
2.
arising from an unforced personal impulse; voluntary; unpremeditated: a spontaneous comment
3.
(of plants) growing naturally; indigenous
Derived Forms
spontaneously, adverb
spontaneousness, noun
Word Origin
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
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Word Origin and History for spontaneously

spontaneous

adj.

1650s, from Late Latin spontaneus "willing, of one's free will," from Latin (sua) sponte "of one's own accord, willingly;" of unknown origin. Related: Spontaneously. Earliest use is of persons and characters. Spontaneous combustion first attested 1795. Spontaneous generation (the phrase, not the event) attested from 1650s.

Online Etymology Dictionary, © 2010 Douglas Harper
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