- noun a logical device whose output is true if there is a difference between two inputs
- A circuit, device, or instrument which compares quantities. Used, for example, to compare a variable with a standard measure or a desired value, or for comparing two quantities with each other.
- A circuit or device, such as a differential amplifier, whose output depends on the comparison of its inputs.
(written as Comparator)One or more alternative options or technologies with which another is compared in cost-effectiveness analyses and related methods.