Akademik

a clause introduced by a relative pronoun

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`who visits frequently' is a relative clause in the sentence `John, who visits frequently, is ill'

1. : an adjective clause introduced by a relative pronoun expressed or suppressed, relative adjective, or relative adverb and having either a purely descriptive force (as in John, who often tells fibs) or a limiting one (as in boys who tell fibs)

2. : a substantive clause introduced by an indefinite relative (as in he belittles whatever his sister tries to do)

a subordinate clause introduced by a relative pronoun, adjective, or adverb, either expressed or deleted, esp. such a clause modifying an antecedent, as who saw you in He's the man who saw you or (that) I wrote in Here's the letter (that) I wrote. Cf. definite relative clause, indefinite relative clause.

relative clause UK US noun [countable] [singular relative clause plural relative clauses] linguistics

a clause joined to a previous one by words such as ‘who’, ‘which’, or ‘that’. Relative clauses give extra information about a person or thing in a sentence.

Thesaurus: types and forms of word, clause or sentence_hyponym