Adjective has 1 sense

• extemporary(s = adj.all) ad-lib, extemporaneous, extempore, impromptu, off-the-cuff, offhand, offhanded, unrehearsed - with little or no preparation or forethought; "a few unrehearsed comments"; "an extemporaneous piano recital"; "an extemporary lecture"; "an extempore skit"; "an impromptu speech"; "an off-the-cuff toast"; "his ad-lib comments showed poor judgment"; "offhand excuses"; "trying to sound offhanded and reassuring"