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English definition of “antibiotic”

antibiotic

noun [C]     /ˌæn.ti.baɪˈɒt.ɪk/ US  /-t̬i.baɪˈɑː.t̬ɪk/
C2 a medicine or chemical that can destroy harmful bacteria in the body or limit their growth: I'm taking antibiotics for a throat infection. a one-month course of antibiotics Some types of antibiotic are used to promote growth in farm animals. He's on antibiotics for an ear infection.Specific medicines and drugsSpecific types of drug
(Definition of antibiotic noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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