mound
noun [ C ] uk/maʊnd/ us/maʊnd/
(PILE)
土堆，沙石堆;小丘
a large pile of earth, stones, etc. like a small hill
a burial mound (= a place where people were buried in ancient times) 墓冢
（一）堆，一（垛）
a large pile of something
a mound of potatoes/papers 一堆土豆／报纸
(BASEBALL)
US（棒球场内高出地面的）投球区土墩
the raised area in baseball from which the pitcher throws the ball