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English definition of “antioxidant”

antioxidant

noun [C]    /ˌænt·iˈɑks·ɪ·dənt, ˌæn·tɑɪ-/
a chemical substance that prevents or slows down the damage that oxygen does to organisms or to food : Vitamin C's antioxidant activity may help boost immune function and may make some people feel better . She takes the vitamins , minerals , antioxidants, and folic acid in women's multivitamins.
(Definition of antioxidant noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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