spontaneity

noun

spon·​ta·​ne·​i·​ty ˌspän-tə-ˈnē-ə-tē  -ˈnā- 

1

: the quality or state of being spontaneous

2

: voluntary or undetermined action or movement

also : its source

Synonyms of spontaneity

• abandon
• naturalness
• abandonment
• enthusiasm

Examples of spontaneity in a Sentence

the spontaneity of their behavior

the couple sacrificed some of the spontaneity in their lives when they both got nine-to-five jobs

Recent Examples on the Web

Meanwhile, the moon in Aries is moving through your fifth house of romance and creativity, adding passion and spontaneity to your day. —Valerie Mesa, PEOPLE, 9 June 2026

There’s teasing, competition, strategy and spontaneity involved — all things that help break couples out of the autopilot feeling that long-term relationships can sometimes slip into. —Mark Travers, CNBC, 7 June 2026

This sense of ease and spontaneity is precisely why nightgown dressing is so alluring. —Diana Tsui, Footwear News, 4 June 2026

The first image in the exhibition announced the playful tenor of the oversize works, which often verged on the ludic despite the lack of spontaneity owing to the cumbersome Land Camera. —James Quandt, Artforum, 2 June 2026

Word History

Etymology

borrowed from New Latin spontāneitāt-, spontāneitās, from Late Latin spontāneus "voluntary, unconstrained, spontaneous" + Latin -itāt-, -itās -ity

First Known Use

1651, in the meaning defined at sense 1

Rhymes for spontaneity

• contemporaneity
• heterogeneity
• inhomogeneity
• deity
• homogeneity
• simultaneity

Kids Definition

spontaneity

noun

spon·​ta·​ne·​ity

ˌspänt-ən-ˈē-ət-ē, 

ˌspänt-ᵊn-, 

-ˈā-ət-

: the quality or state of being spontaneous