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Linking verbs (also known as copulas or copular verbs) are used to describe the state of being of the subject of a clause. Unlike action verbs (also called dynamic verbs), they connect the subject to the predicate of the clause without expressing any action.
1. A verb, such as a form of be or seem, that identifies the predicate of a sentence with the subject. Also called linking verb.
2. Logic The word or set of words that serves as a link between the subject and predicate of a proposition.
[Latin cōpula, link.]
cop′u·lar (-lər) adj.
n, pl -las or -lae (-ˌliː)
1. (Grammar) a verb, such as be, seem, or taste, that is used merely to identify or link the subject with the complement of a sentence. Copulas may serve to link nouns (or pronouns), as in he became king, nouns (or pronouns) and adjectival complements, as in sugar tastes sweet, or nouns (or pronouns) and adverbial complements, as in John is in jail
2. anything that serves as a link
3. (Logic) logic the often unexpressed link between the subject and predicate terms of a categorial proposition, as are in all men are mortal
[C17: from Latin: bond, connection, from co- together + apere to fasten]
cop•u•la(ˈkɒp yə lə)
n., pl. -las, -lae (-ˌli)
1. something that connects or links together.
2. Also called linking verb. a verb, as be, seem, or look, that serves as a connecting link or establishes an identity between subject and complement.
3. the connecting link between the subject and predicate of a proposition.
A verb that identifies or links the subject with the predicate in a sentence, for example, “looks” in “She looks very happy today.”