- 1[intransitive, transitive] to start to burn; to make something start to burn Gas ignites very easily. ignite something Flames melted a lead pipe and ignited leaking gas.
- 2[transitive] ignite something to cause a powerful emotion or reaction; to give force or energy to something His words ignited their anger. The book ignited a firestorm of debate. Legends often ignite the imagination of fiction writers.
NAmE//ɪɡˈnaɪt//(formal)Verb Forms present simple I / you / we / they ignite
he / she / it ignites
past simple ignited
-ing form igniting