The integration of data and voice communications services that are transported over digital facilities of various physical types.

(mathematics) An equation involving a function f(x) and integrals of that function to be solved for f(x)

(physics) A property, characteristic of the state of a thermodynamic system, the change of which is equal to the heat absorbed minus the work done by the system.

Alternative spelling of counterintelligence

(American spelling) Requiring a great deal of work, especially physical and manual effort versus capital.

(mathematics) Any solution to a differential equation.

In Ireland, a tax on interest from savings.

A piston or a rotary heat engine directly powered by the products of intermittent combustion of a fuel.

(US, law enforcement) A division of a law enforcement agency investigating incidents and plausible suspicions of lawbreaking and professional misconduct attributed to officers on the force.

(linguistics) Of two or more speech varieties, able to be understood by one another's speakers.