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

• 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

This is, sadly, a lost art; now everything is an elaborate ballet of calling, texting, and planning, with little room for spontaneity. —Kara Nesvig, Parents, 12 Sep. 2025

While pricey, the Premier Passes offer the most flexibility and allow the kind of spontaneity that makes a Disney trip fun. —Linnea Bailey, Southern Living, 11 Sep. 2025

Each of these artists are leaning into the spontaneity of the city, giving their fans short notice for unique experiences. —Brittany Spanos, Rolling Stone, 9 Sep. 2025

Moreover, with your celestial ruler, Uranus, also retrograde in your fifth house of love, spontaneity and unpredictability reign — this could manifest in a sudden crush, a flirtatious encounter or insane sparks with someone who is the complete opposite of your type. —Valerie Mesa, PEOPLE, 8 Sep. 2025

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