Jan 20, 2018· gyratory (comparative more gyratory, superlative most gyratory) Moving in a circle, or spirally; revolving; whirling around. Derived terms . circumgyratory; gyratory crusher; See also . rotator; Noun . gyratory (plural gyratories) A large traffic roundabout with non-standard lane markings or priorities, or with buildings on the central island.