- (constrain) restrain: hold back
- (constrain) stiffen: restrict; "Tighten the rules"; "stiffen the regulations"
- (constrain) to force physically, by strong persuasion or pressurizing; to compel; to oblige; to keep within close bounds; to confine; to reduce a result in response to limited resources
- (constrain) v. make (sb) do sth by strong (moral) persuasion or by force
- (constrain (Advanced)) Checkboxes for the selections on the Advanced query page. Check to limit results by narrowing the search down to specific terms or other parameters such as depth, time, chief scientist, etc.
- (constrain) Constrained by draft. Boats constrained to a narrow channel by their draft have the right of way. (This is really a special case of restricted maneuverability).