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noun

catalyst

/ˈkætəlɪst/  ·  say it: KAT·uh·list

a substance that speeds up a reaction without being consumed

In Science & Nature

In more detail

1. (noun) a substance that speeds up a chemical reaction without being changed itself

2. (noun) a person or thing that causes something important to happen or change

Examples

How to use catalyst

Catalyst is used literally in chemistry and figuratively to describe a person, event, or factor that precipitates change or action. The figurative use is common in business, social, and political contexts. It typically implies a positive or neutral force that activates potential rather than directly creating the outcome.

Common phrases

Synonyms

accelerant · agent of change · trigger · impetus · spark

Opposites

inhibitor · obstruction

Word family

catalytic (adjective) · catalyze (verb) · catalysis (noun)

A common mistake

Learners sometimes use catalyst to mean the actual cause or primary driver of change, when it more precisely denotes something that enables or accelerates change without being the main force behind it.

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