Which option describes an antonym? Is it a word or phrase that has an opposite meaning, a word or phrase that has a similar meaning a word or phrase that is a model of something or a word or phrase that is familiar.

An antonym is a word or phrase that has an opposite meaning.

The option that describes an antonym is "a word or phrase that has an opposite meaning." An antonym is a term used in linguistics to refer to a word or phrase that has the opposite or contrasting meaning of another word. For example, "hot" is the antonym of "cold," "big" is the antonym of "small," and "happy" is the antonym of "sad." Antonyms are useful for providing clarity and expressing contrasting ideas.

An antonym is a word or phrase that has an opposite meaning.