1. (

• restrict ,
• trammel ,
• limit ,
• bound ,
• confine ,
• throttle ,

) place limits on (extent or amount or access); "restrict the use of this parking lot"; "limit the time you can spend with your friends" ;

2. (

• limit ,
• circumscribe ,
• confine_to

) restrict or confine within limits; "I limit you to two visits to the pub a day"; "please confine your questions to the topic"; "our actions are circumscribed by our biology, personality, and by the social and cultural context into which we are born" ;

3. (

• specify ,
• set ,
• determine ,
• define ,
• fix ,
• limit

) decide upon or fix definitely; "fix the variables"; "specify the parameters" ;