if a horse gallops, it moves very fast with all its feet leaving the ground together [↪ canter, trot]:
A neighbour's horse came galloping down the road, riderless.
a galloping horse
2 [intransitive and transitive]DSH
if you gallop, you ride very fast on a horse or you make it go very fast
gallop along/off/towards etc
I watched as Jan galloped away.
3 [intransitive always + adverb/preposition]
to move very quickly [= run]:
Ian came galloping down the stairs.