Meaning : The grammatical relation that exists when a word qualifies the meaning of the phrase.
Synonyms : modification, qualifying
Meaning : Restricting the scope or freedom of action.
Synonyms : confining, constraining, constrictive, restricting
Meaning : Strictly limiting the reference of a modified word or phrase.
Example :
The restrictive clause in `Each made a list of the books that had influenced him' limits the books on the list to only those particular ones defined by the clause.