æd ˈlɪb əksˌtɛmpɚˈeɪni.əs ɛksˌtɛm.pɜː(ɹ)ˈeɪn.i.əs ɛkˈstɛmpəɹi ɪmˈpɹɒmptju ɪmˈpɹɑmpt(j)u ɪmˈpɹɒmptju ɪmˈpɹɑmpt(j)u ˌɔfˈhænd ɒfˈhændɪd ɔfˈhændɪd ɑfˈhændɪd spɒnˈteɪ.ni.əs.li spɑnˈteɪ.ni.əs.li without advance preparation he spoke ad lib 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 an extemporaneous speech or remark a witty impromptu must not sound premeditated a short musical passage that seems to have been made spontaneously without advance preparation