A mound is a raised part of the ground that is larger than a pile of dirt but smaller than a hill. Mounds can be naturally occurring, but most of the time mounds are made by people piling up some dirt. Burial mounds were used by some civilizations to mark the place of a grave. Mounds can also be used to describe a large pile of something that isn't dirt. For example, you might have a mound of paperwork or a mound of laundry.