1. done or made without preparation or planning; improvised

1. without preparation or advance planning; on the spur of the moment
Usage: often used in formal or academic contexts

Examples

• She gave an extempore speech at the wedding without any notes.
• The jazz musician played extempore, creating a beautiful melody on the spot.
• He was asked to speak extempore about his research findings.
• The extempore debate required quick thinking and confidence.
• She performed an extempore dance routine that impressed the audience.
• The teacher gave an extempore lesson when the planned materials didn't arrive.