nonrestrictive

(-ri striktiv)

adjective

  1. not restrictive
  2. Gram. designating a modifier, as a word, phrase, or subordinate clause, that does not limit the reference of the word or phrase it modifies but merely adds information and thus is not essential to the meaning of a sentence: it is set off by punctuation marks: “who is six feet tall” in “John, who is six feet tall, is younger than Bill” is a nonrestrictive clause

See nonrestrictive in American Heritage Dictionary 4

adjective
  1. Not restrictive: nonrestrictive zoning.
  2. Grammar Of, relating to, or being a subordinate clause or phrase that describes but does not identify or restrict the meaning of the noun, phrase, or clause it modifies, as the clause who live in a small condo in the sentence The Smiths, who live in a small condo, have 11 cats.
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