# catalytic

/ˌkætəˈɫɪtɪk/ (US) · /kˌætɐlˈɪtɪk/ (UK) · CEFR C1 · Adjective

Source: https://englishreference.com/word/catalytic
Updated: 2026-05-07

## Definition

describing something that makes a change or a reaction happen much faster. It is often used for chemicals or for people who start big changes.

For teachers: relating to or acting as a substance that increases the rate of a chemical reaction without being consumed. In a figurative sense, describes an agent that precipitates significant change or development.

## Examples

- The new chemical has a catalytic effect on the reaction.
- The arrival of the new CEO proved to be catalytic, sparking a complete overhaul of the company's outdated technology.
- While the primary reagent is stable at room temperature, the introduction of a catalytic amount of platinum causes an immediate and vigorous exothermic response.

## Usage notes

- Often used in the phrase 'catalytic converter' in automotive contexts or 'catalytic effect' in social and scientific contexts.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.