Merriam-Webster's Collegiate® Dictionary, 11th Edition
MOUND
I. transitive verb
Etymology: origin unknown
Date: 1515
to enclose or fortify with a fence or a ridge of earth, to form into a mound,
II. noun
Usage: often attributive
Etymology: origin unknown
Date: 1551
hedge , fence ,
2. a. an artificial bank or hill of earth or stones, the slightly elevated ground on which a baseball pitcher stands, a rounded hill or natural formation,
3. heap , pile , a small rounded mass