Spontaneous means happening or arising naturally, without being planned or caused by someone or something else. It refers to something that is done or said on the spur of the moment, without prior thought or preparation.

When to use it

People use the word 'spontaneous' to describe something that is done suddenly and without any planning or preparation. It can be used to describe a person's behavior, a decision they make, or an event that happens unexpectedly. For example, a spontaneous decision to go on a road trip or a spontaneous outburst of laughter.

Example sentences

  1. Emily's spontaneous decision to dye her hair purple surprised even herself.
  2. The crowd erupted in spontaneous cheers when the home team won.
  3. Jake's spontaneous joke made everyone at the party laugh.
  4. The couple decided to take a spontaneous road trip to the beach.
  5. Sarah's spontaneous invitation to dinner caught her friends off guard.
  6. The artist created a beautiful, spontaneous painting in just a few hours.
  7. Without any plan, Rachel made a spontaneous visit to her grandmother's house.
  8. The actor's spontaneous improvisation on stage amazed the audience.
  9. The burst of spontaneous singing during the wedding ceremony left everyone emotional.
  10. The children's spontaneous game of tag caused chaos in the park.

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Reference:

spontaneous
1. happening or done in a natural, often sudden way, without any planning or…
spontaneous adjective - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner’s Dictionary at OxfordLearnersDictionaries.com
Definition of spontaneous adjective in Oxford Advanced Learner’s Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.