Glossary of Linguistic Terms

Nonrestrictive Relative Clause

Definition: 

A  nonrestrictive relative clause is a relative clause that does not aid in the identification of the referent of its head noun, but only provides information about it.

Discussion: 

A nonrestrictive relative clause is formally distinguished in some languages.

Examples: 

(English)

John, who passed the test, was elated.

See Also: 
Source: 
138–139