noun

improvisation

ad-lib, extemporization, spontaneity

The play included a lot of improvisation.

The play included a lot of improvisation.

His speech was a brilliant improvisation.

His speech was a brilliant improvisation.

((an improvisation on sth.)) something done spontaneously based on (sth.) The song was an improvisation on a classical theme.

Synonyms: ad-lib, extemporization, spontaneity

From 'improvise', from Latin 'improvisus' (unforeseen), from 'in-' (not) + 'provisus' (foreseen).

Break it down: 'im-' (not) + 'provis-' (provide/foresee). Something done without being provided for or foreseen in advance.

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