1. Carried out or performed with little or no preparation; impromptu: an extemporaneous piano recital.
2. Prepared in advance but delivered without notes or text: an extemporaneous speech.
3. Skilled at or given to unrehearsed speech or performance: an accomplished extemporaneous speaker.
4. Provided, made, or adapted as an expedient; makeshift: an extemporaneous policy decision.
[From Late Latin extemporāneus, from Latin ex tempore; see EXTEMPORE.]
ex·tem′po·ra·nei·ty (-pər-ə-nēĭ-tē) n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.