To Restrict

1. To restrain within boundaries; to limit; to confine
2. (specifically, mathematics) To consider (a function) as defined on a subset of its original domain.

Synonyms

• (to restrain within bounds): To Limit, A Bound, To Circumscribe, withstrain, To Restrain, To Repress, To Curb, To Coerce, To Quarantine (fig.)