Princeton's WordNet

1. improvise, improvize, ad-lib, extemporize, extemporise(verb)

   perform without preparation

   "he extemporized a speech at the wedding"

2. improvise, extemporize(verb)

   manage in a makeshift way; do with whatever is at hand

   "after the hurricane destroyed our house, we had to improvise for weeks"

Kernerman English Learner's Dictionary

1. improvise(verb)ˈɪm prəˌvaɪz

   to create or invent sth using whatever is available

   We had no coffee filters so we improvised with some paper towels.

2. improviseˈɪm prəˌvaɪz

   to act, sing, play an instrument, etc. without planning what to say, sing, or play; = ad-lib

   Jazz musicians love to improvise.

Wiktionary

1. improvise(Verb)

   To make something up or invent it as one goes on; to proceed guided only by imagination, instinct, and guesswork rather than by a careful plan.

Webster Dictionary

1. Improvise(verb)

   to compose, recite, or sing extemporaneously, especially in verse; to extemporize; also, to play upon an instrument, or to act, extemporaneously

2. Improvise(verb)

   to bring about, arrange, or make, on a sudden, or without previous preparation

3. Improvise(verb)

   to invent, or provide, offhand, or on the spur of the moment; as, he improvised a hammer out of a stone

4. Improvise(verb)

   to produce or render extemporaneous compositions, especially in verse or in music, without previous preparation; hence, to do anything offhand

• improviseerAfrikaans
• يَرْتَجِلArabic
• импровизирамBulgarian
• improvisarPortuguese (BR)
• improvizovatCzech
• improvisierenGerman
• improvisereDanish
• αυτοσχεδιάζωGreek
• improvisarSpanish
• improviseerimaEstonian
• فی البداهه آماده کردنFarsi
• improvisoidaFinnish
• improviserFrench
• לְאַלתֵרHebrew
• तत्काल तैयार करनाHindi
• improviziratiCroatian
• rögtönöz, improvizálHungarian
• melakukan improvisasiIndonesian
• spinna; leika af fingrum framIcelandic
• improvvisareItalian
• 即興でするJapanese
• 즉석에서 짓다(연주하다)Korean
• improvizuotiLithuanian
• improvizētLatvian
• secara spontanMalay
• improviserenDutch
• improvisere; fantasere overNorwegian
• improwizowaćPolish
• فی البداهه آماده کردنPersian
• بې تيارۍ ويل،اجراكول ناڅاپه منځ ته راوړلPashto
• improvisarPortuguese
• a improvizaRomanian
• импровизироватьRussian
• improvizovaťSlovak
• improviziratiSlovenian
• improvizovatiSerbian
• improviseraSwedish
• ต่งทันทีโดยไม่ได้เตรียมThai
• doğaçlamakTurkish
• 即興創作或表演Chinese (Trad.)
• імпровізуватиUkrainian
• بغیر تیاری کے گاناUrdu
• ứng biếnVietnamese
• 即兴创作，即兴表演，临时准备Chinese (Simp.)