Extemporaneously refers to speaking or performing without prior preparation or planning. It means delivering a speech or presentation on-the-spot using one's knowledge, skills, and improvisation abilities.
Related terms
Impromptu: Similar to extemporaneously, impromptu refers to doing something without preparation or planning.
Improvisation: The act of creating or performing something spontaneously, often seen in theater or music.
Debating: Engaging in a formal argumentative discussion where participants present arguments and counterarguments on a given topic.