Moving by steps; walking; gressorial: ambulatory: opposed to saltatory: said either of animals or of their gait: in heraldry, said of a tortoise used as a bearing and represented in fesse.In herpetology, walking or running on legs; specifically, of or pertaining to the Gradientia: correlated with salient and serpent.Rising or descending by regular degrees of inclination: as, the gradient line of a railroad.n. Same as grade, 2.n. In physics, the rate at which a variable quantity, as temperature or pressure, changes in value: as, thermometric gradient; barometric gradient.n. In mathematics, a rational integral homogeneous and isobaric function.n. In geometry, slope.