1. a person who speaks, performs, or composes something without preparation or planning; one who improvises
Usage: often used in contexts of music, theater, or public speaking

Examples

• The jazz musician was a skilled extemporizer, creating beautiful melodies on the spot.
• As an extemporizer, she could deliver a compelling speech without any notes.
• The comedian was a natural extemporizer, riffing off audience reactions throughout the show.
• He proved himself an extemporizer when he had to give a presentation with no advance notice.
• The actor's talent as an extemporizer allowed him to handle unexpected script changes gracefully.
• She admired the extemporizer's ability to compose poetry in real time during the performance.