Wiktionary
a. Not rehearsed
WordNet
adj. with little or no preparation or forethought; "his ad-lib comments showed poor judgment"; "an extemporaneous piano recital"; "an extemporary lecture"; "an extempore skit"; "an impromptu speech"; "offhand excuses"; "trying to sound offhanded and reassuring"; "an off-the-cuff toast"; "a few unrehearsed comments" [syn: ad-lib, extemporaneous, extemporary, extempore, impromptu, offhand, offhanded, off-the-cuff]
Usage examples of "unrehearsed".
The unassociated waves of unrehearsed madmen, little children incensed with fury, a dementia, their parents disassociated with all normal social significance, forgetting and blanking out reason and sanity.
And when she uncurled from the easy chair and stood, unrehearsed grace in motion, he caught himself staring.
He was still engrossed in composing an unrehearsed account of the changes he had in mind for the College when the doorbell rang and the au pair girl announced Cornelius Carrington.
I wont tell you any more, so you can imagine it, so you can have it unrehearsed when the time comes, as it will, as it does come.