spontaneously
Americanadverb
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naturally, without premeditation, prompting, or planning.
The author recounts how a fully-fledged exchange market economy emerged spontaneously in his POW camp.
These answers were given spontaneously to an open-ended question that did not offer response options.
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in an impulsive way.
It was so cold the other night that I spontaneously booked a trip to Turks and Caicos.
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by a natural process or from an internal force or cause.
A calf should normally stand spontaneously within 60–90 minutes of its birth.
The symptoms resolved spontaneously within 6 months of onset.
Other Word Forms
Etymology
Origin of spontaneously
Explanation
When you do something spontaneously, you do it on a whim, without preparing for it or giving it much thought. If your math teacher spontaneously breaks into a tap dance, it will surprise the whole class. Spontaneously belting out a song on the subway is very different from practicing over many weeks for a choral concert solo. Things that happen spontaneously aren't planned: improvisation in music or theater, for example, happens spontaneously. Spontaneously comes from the adjective spontaneous, with its Late Latin root spontaneus, "willing," or "of one's free will."
Vocabulary lists containing spontaneously
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Spontaneously, I’d joined a group of old friends on their way to a house party in Hollywood.
From Los Angeles Times • Aug. 15, 2025
Spontaneously changing footwear isn't the worst problem he's faced, though.
From BBC • May 14, 2025
Spontaneously, “they just showed up one day,” said Melissa Russell Paige, who has lived in the same second floor Brooklyn apartment for 8 years and “never saw an ant even once.”
From New York Times • Jul. 10, 2022
Upset: Spontaneously take your husband up on his offer to view his text exchanges.
From Washington Post • Nov. 30, 2021
Spontaneously the throng began to sing “My Country ’Tis of Thee,” which many thought of as the national anthem although no song had yet received that designation.
From "The Devil in the White City" by Erik Larson
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
