GRE TOEFL ignite Definition To set on fire; to cause combustion or a strong reaction. Example "The spark ignited the fuel and started the engine." Sign in to save GRE Quiz → TOEFL Quiz → ← igneous ignoble → Study tips featuring "ignite" Write GRE Words Into Your Own Sentences TOEFL Academic Vocabulary: Study by Topic Related words GRE swill GRE taper GRE testy GRE abacus SAT abase GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate SAT abdomen GRE abduct