impromptu

/ˌɪmpɹˈɑmptu/ · 3 syllables

Meaning

adjective

1. with little or no preparation or forethought
   “his ad-lib comments showed poor judgment”

noun

1. an extemporaneous speech or remark
   “a witty impromptu must not sound premeditated”
2. a short musical passage that seems to have been made spontaneously without advance preparation

adverb

1. without advance preparation
   “he spoke ad lib”

Synonyms for impromptu

• ad-lib
• extemporaneous
• extemporary
• extempore
• offhand
• offhanded
• off-the-cuff
• unrehearsed
• unprepared
• ad lib
• ad libitum
• spontaneously