1. in a manner done or spoken without preparation or planning; impromptu or off-the-cuff
Usage: formal or literary usage; often used in academic or professional contexts

Examples

• The speaker addressed the audience extemporally after the prepared remarks were cut short.
• She performed the piano piece extemporally, improvising variations on the original melody.
• He extemporally composed a poem to celebrate the occasion.
• The jazz musicians played extemporally, responding to each other's improvisations.
• The professor answered the difficult question extemporally without consulting her notes.