1 [intransitive] (+ adv./prep.) when a horse or similar animal gallops, it moves very fast and each stride includes a stage when all four feet are off the ground together The terrified horse galloped off. The ponies galloped along the sand.2 [intransitive, transitive] to ride a horse very fast, usually at a gallop (+ adv./prep.) Jo galloped across the field towards him. gallop something (+ adv./prep.) He galloped his horse home.