Verb

To keep (a physical object that one has obtained) to oneself rather than giving it back to its owner.

To keep (information, etc) to oneself rather than revealing it.

To retain; to keep back; not to grant; as, to withhold assent to a proposition.

Verb

(en verb)

To restrain within bounds; to limit; to confine; as, to restrict worlds to a particular meaning; to restrict a patient to a certain diet.

* {{quote-news

, year=2011 , date=September 28 , author=Jon Smith , title=Valencia 1 - 1 Chelsea , work=BBC Sport citation , page= , passage=It was no less than Valencia deserved after dominating possession in the final 20 minutes although Chelsea defended resolutely and restricted the Spanish side to shooting from long range.}}

(specifically, mathematics) To consider (a function) as defined on a subset of its original domain.

If we restrict sine to $[-\backslash frac\backslash pi2,\backslash frac\backslash pi2]$, we can define its inverse.