operativityn.

1890 Cent. Dict. Operativity, the condition of being operative; efficiency.

1912 Amer. Econ. Rev. 2 482 A study of the ‘operativity’, i.e., the average number of deposits and withdrawals per account per annum, in the various classes of British savings banks.

1983 Representations Summer 28 If he upholds the ‘vanity’ of a discourse which takes its operativity from a fiction.

1990 W. F. Overton Reasoning, Necessity, & Logic 189 At each point of development there are documented empirical links between some plausible measure of necessity and operativity.