1. The act or process of creating and performing something (music, speech, dance, etc.) spontaneously without preparation or a script.
Usage: Usually plural when referring to multiple instances or pieces; can be used as a mass noun in singular form.
2. A piece of music, speech, dance, or other performance that is created and performed on the spot without prior composition or planning.
Usage: Commonly used in music, theater, and comedy contexts.

Examples

• The jazz musicians' improvisations delighted the audience with their creative solos.
• Her improvisations on the piano showed remarkable skill and musical intuition.
• The comedy troupe performed several improvisations based on audience suggestions.
• His improvisations during the speech made it feel more genuine and engaging.
• The dance class focused on improvisations to help students develop movement creativity.
• These improvisations demonstrate how quickly the band can adapt to new ideas.
• The actor's improvisations added humor and spontaneity to the scene.