Very, much

"Assai" is an Italian adverb that translates to "very" or "much" in English, conveying the meanings of "great extent" or "considerable degree".

In music, "assai" is used as a modifier to indicate that a particular element or quality should be emphasized significantly. For example, "allegro assai" would mean "very fast", indicating a much higher tempo than a regular "allegro".

In other words, when "assai" is used in musical notation, it instructs performers to apply the indicated quality or characteristic to a significant degree, allowing the audience to experience a heightened and pronounced musical element.

Example of Assai

Boston Baroque — Allegro assai from Mozart's Symphony No. 40 in G minor