What is the meaning of mound?

noun

• Baseball) the slight elevation on which the pitcher stands.
  • synonyms: hill, pitcher's mound
• A small natural hill.
  • synonyms: knoll, hillock, hummock, hammock
• A collection of objects laid on top of each other.
  • synonyms: pile, heap, agglomerate, cumulation, cumulus
• Structure consisting of an artificial heap or bank usually of earth or stones.
  • usage: "they built small mounds to hide behind"
  • synonyms: hill
• The position on a baseball team of the player who throws the ball for a batter to try to hit.
  • usage: "he has played every position except pitcher"; "they have a southpaw on the mound"
  • synonyms: pitcher

verb

• Form into a rounded elevation.
  • usage: "mound earth"