Substance (such as penicillin) that destroys or inhibits the growth of other microorganisms and is used in the treatment of external or internal infections. While some antibiotics are produced by microorganisms, most are now manufactured synthetically.

Use antibiotic in a sentence

  • My colleague was feeling sick but was hesitant to use an antibiotic but I explained that this is the precise time when it is optimal to do so.

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  • While it is important to treat many bacterial infections with an appropriate antibiotic, there is no need to use one for a virus such as the common cold.

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  • I went to the doctor for my cough and chest congestion and was prescribed an antibiotic to treat the infection.

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