Did you know?

Click any word in a definition or example to find the entry for that word

spontaneous

 - definition
 
Close

What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.

Close

Thesaurus

The thesaurus of synonyms and related words is fully integrated into the dictionary entries. Click on the T button in an entry to review the synonyms and related words for that meaning.

more
adjective American English pronunciation: spontaneous /spɑnˈteɪniəs/

Related dictionary definitions

  1. happening in a natural way without being planned or thought about

    spontaneous applause/cheers

    He was suddenly filled with tears of spontaneous emotion.

    1. b.
      science used about chemical or biological changes or processes that happen suddenly in a natural way

      spontaneous wildfires

      spontaneous contractions of the muscles in the esophagus

derived words

spontaneously

adverb

spontaneousness

noun [uncountable]

mom jeans

a style of loose-fitting jeans with a high waist, often considered unfashionable

BuzzWord Article

Word of the Day

twilit

lit only by twilight

Open Dictionary

endies

Employed but with No Disposable Income or Savings: people who are in work but only earn just enough to live on

add a word

Blog

A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog