drift
/ˈdrift/
noun
the act of driving something along
the flow or the velocity of the current of a river or ocean stream
something driven, propelled, or urged along or drawn together in a clump by or as if by a natural agency: such as
verb
to become driven or carried along (as by a current of water, wind, or air)
to move or float smoothly and effortlessly
to move along a line of least resistance
a balloon drifting in the wind
noun
a stretch of fence on rangeland especially in the western U.S. for preventing cattle from drifting from their home range