We have no meanings for "speak extemporaneously" in our records yet.
1 Anyway, Don shifted gears and began speaking extemporaneously , without questions or prompting, which was sort of refreshing.
2 Dr. -- , apractitionerof medicine and a bishop in this Church, spoke extemporaneously in our language.
3 She spoke extemporaneously , and "brought down the house".
4 He generally spoke extemporaneously , on the spur of the occasion, and what he said came warm from the heart.
5 Some said that he spoke extemporaneously , but by now Lincoln never approached even the possibility of such a speech without careful preparation.
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