Source : Webster's Revised Unabridged Dictionary (1913)

Weather \Weath"er\, a. (Naut.)
   Being toward the wind, or windward -- opposed to lee; as,
   weather bow, weather braces, weather gauge, weather lifts,
   weather quarter, weather shrouds, etc.

   {Weather gauge}.
   (a) (Naut.) The position of a ship to the windward of
       another.
   (b) Fig.: A position of advantage or superiority; advantage
       in position.

             To veer, and tack, and steer a cause Against the
             weather gauge of laws.               --Hudibras.

   {Weather helm} (Naut.), a tendency on the part of a sailing
      vessel to come up into the wind, rendering it necessary to
      put the helm up, that is, toward the weather side.

   {Weather shore} (Naut.), the shore to the windward of a ship.
      --Totten.

   {Weather tide} (Naut.), the tide which sets against the lee
      side of a ship, impelling her to the windward. --Mar.
      Dict.