spontaneity

American  

[spon-tuh-nee-i-tee, -ney-] / ˌspɒn təˈni ɪ ti, -ˈneɪ- /

noun

plural

spontaneities

1. the state, quality, or fact of being spontaneous.

2. spontaneous activity.

3. spontaneities, spontaneous impulses, movements, or actions.

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spontaneity British  

/ -ˈneɪ-, ˌspɒntəˈniːɪtɪ /

noun

1. the state or quality of being spontaneous

2. (often plural) the exhibiting of actions, impulses, or behaviour that are stimulated by internal processes

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Usage

What does spontaneity mean? Spontaneity is the state or quality of being spontaneous—happening naturally and without being planned. When you describe an action or event as spontaneous, it means it happened naturally, without having been planned, as in The meeting turned into a spontaneous dance party. Spontaneity can also refer to this kind of spontaneous activity. When something that someone does is described as spontaneous, it means it was done out of a natural impulse, without having been thought about beforehandWhen spontaneous is used to describe a person, it means they have a tendency to or are known for doing things impulsively and without planning. This is usually used in a positive way to portray them as a fun person who is adventurous and willing to do things on the spur of the moment. Telling someone to be more spontaneous or introduce more spontaneity into their life means you want them to be more flexible and willing to do more things on a whim instead of needing for things to be completely structured or scheduled. Example: I feel stuck in a routine—I need more spontaneity in my life.

Etymology

Origin of spontaneity

First recorded in 1645–55; from Late Latin spontāne(us) spontaneous + -ity

Explanation

Acting with spontaneity might mean bursting into song on the street, or throwing down your rake and jumping in a pile of leaves — in other words, doing something without thinking it through beforehand. The noun spontaneity is related to a more common word, the adjective spontaneous. The writer Ralph Waldo Emerson said, “Our spontaneous action is always the best. You cannot, with your best deliberation and heed, come so close to any question as your spontaneous glance shall bring you.” He meant that if we learn to trust our instincts instead of weighing the potential consequences of everything we do, we'll make better decisions.

Example Sentences

Amid all those preoccupations for his physical performance, Ortiz also had to deliver his lines and be present in the moment, reacting to Gosling with spontaneity.

From Los Angeles Times • Apr. 7, 2026

The live communion of these four musicians especially befits Big Ears, a festival devoted to unconventional music and famous for its promise of spontaneity around each corner.

From The Wall Street Journal • Apr. 4, 2026

It can feel counterintuitive to go out with friends and then impose limits on your spontaneity.

From MarketWatch • Mar. 27, 2026

But some Singaporeans wish authorities would leave more room for spontaneity.

From BBC • Mar. 7, 2026

This is the critical lesson of improv, too, and it is also a key to understanding the puzzle of Millennium Challenge: spontaneity isn’t random.

From "Blink" by Malcolm Gladwell