verb-intransitive. To move or run in the mode called a gallop; as a horse; to go at a gallop; to run or move with speed.verb-intransitive. To ride a horse at a gallop.verb-intransitive. Fig.: To go rapidly or carelessly, as in making a hasty examination.v. To cause to gallop.n. A mode of running by a quadruped, particularly by a horse, by lifting alternately the fore feet and the hind feet, in successive leaps or bounds.