- 1extinguish something to make a fire stop burning or a light stop shining synonym put out Firefighters tried to extinguish the flames. (formal) All lights had been extinguished.
- 2extinguish something to destroy something News of the bombing extinguished all hope of peace.
NAmE//ɪkˈstɪŋɡwɪʃ//Verb Forms present simple I / you / we / they extinguish
he / she / it extinguishes
past simple extinguished
-ing form extinguishing