1. creating or performing something spontaneously without preparation
Usage: present participle of improvise
2. making or creating something from available materials when proper equipment is not available
Usage: present participle of improvise

Examples

• The jazz musician was improvising a solo during the performance.
• She’s good at improvising when she forgets her lines on stage.
• We were improvising dinner with whatever was left in the refrigerator.
• The actors spent the workshop improvising different scenarios.
• He’s improvising a bookshelf using old wooden crates.
• The chef was improvising the recipe without a cookbook.
• They’re improvising a tent using a tarp and some rope.