Word forms: catalyses
Definitionsregional note: in AM, use catalyze
1. verb If something catalyses a thing or a situation, it makes it active. [formal] [V n] ⇒ Any unexpected circumstance that arises may catalyze a sudden escalation of violence. 2. verb In chemistry, if something catalyses a reaction or event, it causes it to happen. [technical] [be V-ed] ⇒ It had been known for some time that chemical reactions can be catalyzed by materials with large surface areas. [V n] ⇒ The wires do not have a large enough surface to catalyse a big explosion.
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