Term: Non-defining Relative Clauses

Definition:

A non-defining relative clause gives extra information about a noun or noun phrase and has commas at both ends:

My sister, who lives in France, is coming to stay with me next week. ('who lives in France' is not essential, which means that I only have one sister and she does not need to be defined by the relative clause)

'Who' and 'whose' are used for people. 'Which' and 'whose' are used for things. 'That' cannot be used in a non-defining relative clause.

See Also: Defining Relative Clause; Relative Pronoun Related Article: Relative Clauses - Learn about Relative Pronouns in Non-Restrictive Clauses (Non-Defining clauses) and Restrictive Clauses (Defining clauses).

'Non-defining Relative Clauses' - Related Links

Grammar Topic:  Relative Pronouns

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