restrictive

adj

1. Confining, limiting, containing within defined bounds.

   “The help tended to be officious, the rules, if heeded, restrictive, and the management meddlesome.”

   “The pinnacle of the effort to fix restrictive meanings to a set of terminology can be found in two papers in American Speech by Feinsilver (1979, 1980).”

2. limiting free and easy bodily movement.

   “Some of them [teenagers] who will become lesbians clearly are being hit with the same kind of garbage which we got hit with in the fifties. There's been a real resurgence of that in terms of values and double standards and music. The clothes again — we're back to high heels and restrictive little femmy outfits.”

noun

1. A clause that narrows the meaning of a noun or noun phrase.

   “[…] a couple of further differences between restrictive and non-restrictive relative clauses: (1) in contrast with restrictives, the wh-phrase in non-restrictives cannot be ellipted; […]”