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WordReference Random House Learner's Dictionary of American English © 2024ir•ri•tant /ˈɪrɪtənt/USA pronunciation n. [countable]- anyone or anything that causes a feeling of impatience or anger:A lazy worker is an irritant to colleagues.
a substance that causes a feeling of itching or other irritation on the skin or some part of the body. WordReference Random House Unabridged Dictionary of American English © 2024ir•ri•tant (ir′i tnt),USA pronunciation adj. - tending to cause irritation;
irritating.
n. - anything that irritates.
- Pathology, Physiology[Physiol., Pathol.]a biological, chemical, or physical agent that stimulates a characteristic function or elicits a response, esp. an inflammatory response.
- Latin irrītant- (stem of irrītāns), present participle of irrītāre to irritate; see -ant
- 1630–40
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