Noun

(en noun)

The act or art of composing and rendering music, poetry, and the like, extemporaneously; as, improvisation on the organ.

That which is improvised; an impromptu.

Musical technique, characteristic of blues music.

The act of improvising, acting or going about something without planning ahead

* {{quote-news

, year=2012 , date=September 15 , author=Amy Lawrence , title=Arsenal's Gervinho enjoys the joy of six against lowly Southampton , work=the Guardian citation , page= , passage=The Ivorian is a player with such a liking for improvisation it does not usually look like he has any more idea than anyone else what he is going to do next, so it was an interesting choice.}}

Noun

A natural or inherent impulse or behaviour.

Many animals fear fire by instinct .

* Shakespeare

By a divine instinct , men's minds mistrust / Ensuing dangers.

* {{quote-book

, year=1921 , title= , author=Bertrand Russell , passage=In spite of these qualifications, the broad distinction between instinct and habit is undeniable. To take extreme cases, every animal at birth can take food by instinct, before it has had opportunity to learn; on the other hand, no one can ride a bicycle by instinct, though, after learning, the necessary movements become just as automatic as if they were instinctive.}}

An intuitive reaction not based on rational conscious thought.

an instinct''' for order; to be modest by '''instinct

Debbie's instinct was to distrust John.