To trot is move faster than walking, but not quite at a full-out run. You might trot down the street when you hear the ice cream truck coming.
People can trot — as they do when they jog or do a slow run — and so can four-legged animals, especially horses. When you see a horse trot, you'll notice that its diagonally opposite legs move together, touching the ground at the same time. Trot is a Middle English word that comes from Old French, troter, "to trot or to go," which in turn has a Germanic root related to the word tread.