How To Spell improvisation?

Correct spelling: improvisation

What is the definition of improvisation?

  1. a creation spoken or written or composed extemporaneously (without prior preparation)

Google Ngram Viewer results for improvisation:

This graph shows how "improvisation" have occurred between 1800 and 2008 in a corpus of English books.

What are the usage examples for improvisation?

  1. Seemingly fabulous, yet apparently true stories of improvisation feats by Arabic poets are numerous. – The Literature of Ecstasy by Albert Mordell