Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “antihistamine”


noun [C]    /ˌænt·iˈhɪs·təˌmin, ˌæn·tɑɪ-, -mən/
a drug taken to limit the bad effect of the body’s reaction to some substances : I took an antihistamine for my runny nose .
(Definition of antihistamine noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of antihistamine

Definitions of “antihistamine” in other dictionaries

Translations of “antihistamine”

Word of the Day


a skilled and trained cook who works in a hotel or restaurant, especially the most important cook

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More