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Definitions from the Web

Extemporaneous

Definition:

Adj. Done, spoken, or performed without prior preparation or planning.

Senses:

1. Relating to Speech or Performance:

Adj. Referring to something improvised or done on the spur of the moment.

Example sentence: The stand-up comedian delivered an extemporaneous performance that had the audience in stitches.

2. Unrehearsed or Unplanned:

Adj. Describing something that is done or spoken with little or no preparation.

Example sentence: The professor gave an extemporaneous lecture on current events, showcasing his vast knowledge without referring to any notes.

3. Biology:

Adj. Pertaining to a flower that opens suddenly and briefly.

Example sentence: The botanist observed the extemporaneous blooming of a rare orchid species in the wild.