Adjective clause

A type of subordinate clause which does the work of an adjective.

• This is the thief who stole the horse.

In the sentence given above, the noun thief is qualified by the clause who stole the horse. As the clause does the work of an adjective, it is called an adjective clause.

• There was a time when I could lift 250 lbs.
• The restaurant which we visited last night was pretty good.