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antibiotic

Adjective[C/U] Both
pl: antibiotics

A clinical term referring to agents that combat bacterial infections. It carries a connotation of medical precision and scientific intervention. Unlike 'antiviral' or 'antifungal', this word is specifically associated with bacteria. In common parlance, people often use it as a catch-all for any medicine treating an infection, though technically it is useless against viruses like the common cold. Usage ranges from highly technical medical contexts to everyday conversations about health and prescriptions. There is an increasing modern nuance regarding 'antibiotic resistance', which adds a layer of caution or urgency to how the word is used in public health discussions.

Countable when referring to a specific drug or a pill ('This is a powerful antibiotic'). Uncountable when referring to the general class of medication or the chemical property ('The patient was treated with antibiotics').

Meanings

Noun

A medicine that inhibits the growth of or destroys microorganisms, especially bacteria.

"The doctor prescribed a course of antibiotics to treat the chest infection."

Adjective

Relating to or producing an effect that kills or prevents the growth of microorganisms.

"Penicillin was one of the first antibiotic drugs developed for clinical use."

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Last Updated: May 31, 2026Report an Error