1. float, drift, be adrift, blow, travel, go, move, locomote
usage: be in motion due to some air or water current; "The leaves were blowing in the wind"; "the boat drifted on the lake"; "The sailboat was adrift on the open sea"; "the shipwrecked boat drifted away from the shore"
2. stray, err, drift, travel, go, move, locomote
usage: wander from a direct course or at random; "The child strayed from the path and her parents lost sight of her"; "don't drift from the set course"
usage: move about aimlessly or without any destination, often in search of food or employment; "The gypsies roamed the woods"; "roving vagabonds"; "the wandering Jew"; "The cattle roam across the prairie"; "the laborers drift from one town to the next"; "They rolled from town to town"
4. drift, vary
usage: vary or move from a fixed point or course; "stock prices are drifting higher"