one of the coordinates in a system of coordinates that locates a point on a plane or in space by its distance from two lines or three planes respectiv more..one of the coordinates in a system of coordinates that locates a point on a plane or in space by its distance from two lines or three planes respectively; the two lines or the intersections of the three planes are the coordinate axes(noun.cognition)

either of two values that locate a point on a plane by its distance from a fixed pole and its angle from a fixed line passing through the pole (noun.cognition)