impromptu

English Thesaurus

1. an extemporaneous speech or remark (noun.communication)

hypernym	:	address, speech,
definition	:	the act of delivering a formal spoken communication to an audience (noun.communication)

2. a short musical passage that seems to have been made spontaneously without advance preparation (noun.communication)

hypernym	:	musical passage, passage,
definition	:	a short section of a musical composition (noun.communication)

3. with little or no preparation or forethought (adj.all)

similar	:	unprepared,
definition	:	without preparation; not prepared for (adj.all)