美 
											[ekˌstempə'reɪnɪəs]
																
										
							
																																	"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"