1. With little or no preparation or forethought
   "an extemporary lecture"
   - ad-lib, extemporaneous, extempore, impromptu, offhand, offhanded, off-the-cuff, unrehearsed

See also: extemporarily, unprepared

• bimanual
• bimbo
• bimester
• bimestrial
• bimetal
• bimetallic
• bleeding
• bleeding heart
• bleeding tooth
• bleeding-edge
• bleep
• bleeper
• blemish
• blemished
• blench
• blend
• blend in
• blende
• blended
• blended whiskey
• blended whisky
• blender
• blending
• Blenheim
• Blenheim spaniel