- The definition of a catalyst is someone or something that speeds up or brings about an event.
An example of catalyst is how President Bush's claims that Iraq had weapons of mass destruction started the war in Iraq.
- Catalyst is defined as a substance that speeds up the rate of a chemical reaction.
An example of catalyst is using a catalytic converter to change carbon monoxide into carbon dioxide.
- any substance serving as the agent in catalysis
- a person or thing acting as the stimulus in bringing about or hastening a result
- Chemistry A substance, usually used in small amounts relative to the reactants, that modifies and increases the rate of a reaction without being consumed in the process.
- One that precipitates a process or event, especially without being involved in or changed by the consequences: “A free press &ellipsis; has remained &ellipsis; a vital catalyst to an informed and responsible electorate” (Robert O'Neal).
Origin of catalystFrom catalysis.
- (chemistry) A substance that increases the rate of a chemical reaction without being consumed in the process.
- Someone or something that encourages progress or change.
- Economic development and integration are working as a catalyst for peace.
- (literature) An inciting incident which that sets the successive conflict into motion.
- (automotive) A catalytic converter.
From catalysis + -ist.