activated; functional; functioning; operating; working

plural of operability

(medicine) Such that it allows an operation to take place.

plural of NOT operator

A showing of something — such as a variable, term, or object — in terms of the specific process or set of validation tests used to determine its presence and quantity.

Alternative form of operations research

Alternative form of nonoperational

(calculus) The study of calculus from the perspective of the theory of operators.

(military, psychiatry) The acute psychological trauma experienced in combat environments which can lead to combat fatigue.

plural of operational definition