n. & v.
—n.
1 a raised mass of earth, stones, or other compacted material.
2 a heap or pile.
3 a hillock.
—v.tr.
1 heap up in a mound or mounds.
2 enclose with mounds.
Etymology: 16th c. (orig. = hedge or fence): orig. unkn.
2.
n. Heraldry a ball of gold etc. representing the earth, and usu. surmounting a crown.
Etymology: ME f. OF monde f. L mundus world
Useful english dictionary. 2012.