limitation, restriction - a principle that limits the extent of something; "I am willing to accept certain restrictions on my movements"

functional calculus, predicate calculus - a system of symbolic logic that represents individuals and predicates and quantification over individuals (as well as the relations between propositions)

measure, measurement, measuring, mensuration - the act or process of measuring; "the measurements were carefully done"; "his mental measurings proved remarkably accurate"

gradation, graduation - the act of arranging in grades