What does antonymy mean?
Antonymy is the technical name for the semantic relationship that holds between words of opposite meaning — pairs such as hot and cold, up and down, or alive and dead. It belongs to the vocabulary of linguistics and lexicography, where it is treated as one of the core sense relations, alongside synonymy (sameness of meaning) and hyponymy (inclusion of meaning). Far from being a single uniform phenomenon, antonymy comes in recognised varieties: gradable antonymy links terms at opposite ends of a scale, complementary antonymy divides a domain into mutually exclusive alternatives, and converse antonymy relates terms that describe the same situation from reversed perspectives, as buy and sell do. The word derives from Greek roots via the noun antonym, which denotes an individual word that stands in this opposite relation to another. Though rarely heard outside academic discussion, antonymy usefully names something speakers grasp intuitively: the way language organises meaning through structured opposition.
nounThe semantic relationship between words that have opposite meanings; the linguistic phenomenon of oppositeness of meaning, as between 'hot' and 'cold'.
- The semantic relationship holding between words with opposite meanings (a sense relation in linguistics).
- The branch or topic within semantics that studies such opposite-meaning relations and their types.
"In semantics, antonymy is one of the fundamental sense relations, alongside synonymy and hyponymy."
"The textbook chapter on sense relations covered synonymy, antonymy, and hyponymy in turn."
"Because 'big' and 'small' are gradable rather than absolute opposites, their antonymy differs from that of 'alive' and 'dead'."
A plural is occasionally seen in technical writing when distinguishing different types or instances of the relation, but the noun is usually treated as uncountable.
"The paper compared the various antonymies found across the two languages."
Every time you say a word means 'the opposite' of another, you're invoking antonymy — and linguists still argue about how many different kinds of 'opposite' there really are.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of antonymy
Antonymy is formed from antonym, a word coined in the nineteenth century from Greek anti- ('against, opposite') and ōnoma ('name'), by analogy with the older term synonym (Greek syn- 'together'). The suffix -y turns it into an abstract noun naming the relation itself, just as synonymy does for sameness of meaning. Its cognates thus include other Greek-derived -onym formations such as pseudonym, anonymous, and homonym, all built on the root for 'name'.
Related word forms
How antonymy is actually used
Antonymy is a technical term used chiefly in linguistics, semantics, and lexicography; it is rare in everyday conversation, where people simply speak of words being 'opposites'. It is an uncountable abstract noun and normally takes no plural in ordinary use.
Easily confused with antonymy
Synonymy is the relation of sameness or similarity of meaning between words, whereas antonymy is the relation of opposite meaning.
Antagonism refers to active hostility or opposition between people or forces, while antonymy is a purely semantic relation between word meanings.