What does antonym mean?
An antonym is a word whose meaning stands in direct opposition to that of another word: 'hot' is the antonym of 'cold', just as 'success' is the antonym of 'failure'. The term belongs to the vocabulary of linguistics and language teaching, where it is used to describe one of the fundamental sense relations between words, alongside synonymy (sameness of meaning). Antonyms are valuable tools for learners of English because knowing a word's opposite helps fix its meaning in memory and sharpens precision in writing and speech. Linguists sometimes distinguish types of antonyms, such as gradable pairs like 'big' and 'small', complementary pairs like 'alive' and 'dead', and relational pairs like 'buy' and 'sell'. In casual conversation most speakers simply say 'opposite', but 'antonym' remains the precise, widely understood term in dictionaries, classrooms, and word games.
nounA word that means the opposite of another word, such as 'hot' being the antonym of 'cold'.
- A word that expresses a meaning opposite to that of another word.
"Students were asked to supply an antonym for each vocabulary word on the quiz."
"'Light' is the antonym of 'dark'."
"The teacher asked the class to write down three antonyms for the word 'generous'."
Standard regular plural; used when referring to several opposite-word pairs or lists of opposites.
"The worksheet listed ten adjectives and asked students to write their antonyms."
The word 'antonym' contains its own opposite — 'synonym' — and both come from the same Greek root for 'name'.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of antonym
Antonym derives from Greek roots: 'anti-', meaning 'against' or 'opposite', combined with 'onoma', meaning 'name'. It entered English in the mid-19th century, formed on the model of the older word 'synonym', which shares the same Greek root 'onoma'. Related English words from the same root include 'anonymous', 'pseudonym', and 'eponym'.
Related word forms
How antonym is actually used
Antonym is a neutral, standard term used in linguistics and education. In everyday speech people more often say simply 'opposite', while 'antonym' carries a slightly technical or classroom flavour.
Easily confused with antonym
A synonym is a word with the same or similar meaning as another word, whereas an antonym is a word with the opposite meaning.