Definitions of mound:

• noun:   structure consisting of an artificial heap or bank usually of earth or stones

  Example: "They built small mounds to hide behind"

• noun:   (baseball) the slight elevation on which the pitcher stands
• noun:   the position on a baseball team of the player who throws the ball for a batter to try to hit

  Example: "They have a southpaw on the mound"

• noun:   a small natural hill
• noun:   a collection of objects laid on top of each other
• verb:   form into a rounded elevation

  Example: "Mound earth"

• name:  A surname (very rare: popularity rank in the U.S.: #69851)