plural of smooth operator

A covert operation typically involving activities that are highly clandestine and outside of standard military protocol.

plural of black operation

Alternative spelling of uncooperative

plural of tour operator

(mathematics, functional analysis) An operator L such that for functions f and g and scalar λ, L (f + g) = L f + L g and L λf = λ L f.

plural of linear operator

plural of additive operation

plural of order of operations

plural of operating loss