constraints

plural of constraint

(countable, uncountable) Something that constrains; a restriction.
(countable, uncountable) An irresistible force or compulsion.
(countable, uncountable) The repression of one's feelings.
(countable, uncountable) A condition that a solution to an optimization problem must satisfy.
(countable, uncountable) A linkage or other restriction that maintains database integrity.