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antibiotic

A medicine that inhibits the growth of or destroys microorganisms, especially bacteria. / Relating to or producing an effect that kills or prevents the growth of microorganisms.
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').

💬Casual Conversation

🎬Tuesday afternoon, Maya is at work and Jackson is texting her from his couch.
Jackson

My throat is killing me. Think I need an antibiotic.

My throat is killing me. Think I need an antibiotic.

Jackson
Maya
Maya

Stop playing doctor and just go to a clinic, you clown.

Stop playing doctor and just go to a clinic, you clown.

Meanings

Noun

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

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.

Examples

The doctor prescribed a strong antibiotic to clear the infection.

The patient responded well to the antibiotic treatment.

Related Words

Last Updated: May 2026Report an Error