Definition of extemporaneous in English:

extemporaneous

Syllabification: ex·tem·po·ra·ne·ous
Pronunciation: /ikˌstempəˈrānēəs
 
/

adjective

Spoken or done without preparation: an extemporaneous speech
More example sentences
  • In the old days, legislators delivered long-winded, convoluted, extemporaneous speeches from the floor.
  • When pressed for some favorite locations, Murdoch begins a long litany that is both incredibly informed and casually extemporaneous.
  • The manuscript should resemble an extemporaneous speech with short, relatively simple sentences and paragraphs, personal pronouns and occasional colloquialisms.

Derivatives

extemporaneously

adverb
More example sentences
  • It's pretty common to make this sort of error when one says something extemporaneously; as I've said before, just read some transcripts some time.
  • She arrived to an enthusiastic ovation and spoke, as she almost always does, quite extemporaneously.
  • I'm going to pose to each of them a question to which they will respond extemporaneously - no PowerPoint presentations, no viewgraphs.

extemporaneousness

noun

Definition of extemporaneous in:

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Word of the day glee
Pronunciation: glē
noun
great delight