Catalyst definition

kătl-ĭst
Frequency:
A person or thing acting as the stimulus in bringing about or hastening a result.
noun
18
4
One that precipitates a process or event, especially without being involved in or changed by the consequences.
noun
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(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.
noun
9
2
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.

noun
3
0
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.

noun
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(chemistry) A substance that increases the rate of a chemical reaction without being consumed in the process.
noun
2
0
Someone or something that encourages progress or change.

Economic development and integration are working as a catalyst for peace.

noun
2
0
(automotive) A catalytic converter.
noun
1
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(literature) An inciting incident which that sets the successive conflict into motion.
noun
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0
Any substance serving as the agent in catalysis.
noun
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1
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(1) A platform for running macOS and iPadOS apps. See Catalina.
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1
A substance that starts or speeds up a chemical reaction while undergoing no permanent change itself. The enzymes in saliva, for example, are catalysts in digestion.
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3

Other Word Forms

Noun

Singular:
catalyst
Plural:
catalysts

Origin of catalyst

  • From catalysis

    From American Heritage Dictionary of the English Language, 5th Edition

  • From catalysis +‎ -ist.

    From Wiktionary