A Superrotating Wind (or Prograde Wind) is a wind carrying Atmosphere around a world (planet or Moon) in the same direction as the world is rotating. The concept can seem non-intuitive but in some sense, wind can happen in any direction, which can as easily be prograde as retrograde, and the Coriolis Force provides a mechanism for orienting the direction of winds in both, i.e., in Hadley Cells and similar circulation patterns. On Earth, the Trade Winds and Jet Streams are examples of superrotating winds.
Planets and moons with multiple Zonal Flows, such as Jupiter and Saturn typically have Jets (i.e., Jet Streams) that alternate, some being prograde (Superrotating Jets). Venus has a strong superrotating wind, reaching 700km/h and Titan has similar superrotating winds. The possibility and effects are of interest in the study of Extra-Solar Planets.