"restriction" in the noun sense
1. restriction, limitation
a principle that limits the extent of something
"I am willing to accept certain restrictions on my movements"
2. limitation, restriction
an act of limiting or restricting (as by regulation)
3. restriction, confinement
the act of keeping something within specified bounds (by force if necessary
"the restriction of the infection to a focal area"
Source: WordNet® (An amazing lexical database of English)
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