Definition of ground

• the solid part of the earths surface; "the plane turned away from the sea and moved back over land"; "the earth shook for several minutes"; "he dropped the logs on the ground"
• a rational motive for a belief or action; "the reason that war was declared"; "the grounds for their declaration"
• the loose soft material that makes up a large part of the land surface; "they dug into the earth outside the church"