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Spontaneous definition

spŏn-tānē-əs
Having no apparent external cause or influence; occurring or produced by its own energy, force, etc. or through internal causes; self-acting.
adjective
23
8
Growing naturally without being planted or tended; indigenous; wild.
adjective
12
4
Acting in accordance with or resulting from a natural feeling, impulse, or tendency, without any constraint, effort, or premeditation.
adjective
7
3
Growing without cultivation or human labor.

Spontaneous vegetation.

adjective
5
2
Controlled and directed internally : self-active : spontaneous movement characteristic of living things.
adjective
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Sudden, without warning.
adjective
2
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The definition of spontaneous is unplanned or done on impulse.

An example of spontaneous is waking up and deciding to take a trip across the country that day.

adjective
2
1
Done by one's own free choice, or without planning.
adjective
1
0
Random.
adjective
1
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Self generated; happening without any apparent external cause.

He made a spontaneous offer of help.

adjective
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Proceeding from natural feeling or native tendency without external constraint.
adjective
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Arising from a momentary impulse.
adjective
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Produced without being planted or without human labor : indigenous.
adjective
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Not apparently contrived or manipulated : natural.
adjective
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0
Unconstrained and unstudied in manner or behavior.

A spontaneous personality.

adjective
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2
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Happening or arising without apparent external cause; self-generated.

A microorganism capable of spontaneous movement.

adjective
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2
Arising from a natural inclination or impulse and not from forethought or prompting.

Spontaneous laughter; a spontaneous protest.

adjective
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2

Origin of spontaneous

  • From Late Latin spontāneus of one's own accord from Latin sponte (s)pen- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Late Latin spontaneus, from Latin sponte (sua) (“of one's free will, voluntarily").

    From Wiktionary

Spontaneous Sentence Examples

  • Sometimes spontaneous events worked out better than well-planned ones.

  • Helen is a wonderful child, so spontaneous and eager to learn.

  • Almost all day long the house resounded with their running feet, their cries, and their spontaneous laughter.

  • And Nicholas heard her spontaneous, happy, ringing laughter.

  • Others are deprived of a part of their more volatile constituents by spontaneous evaporation, or by distillation, in vacuo or otherwise, at the lowest possible temperature.

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Related articles

Words near spontaneous in the Dictionary