Definition of "Earth" :

noun: a connection between an electrical device and a large conducting body, such as the earth (which is taken to be at zero voltage)

noun: the concerns of this life as distinguished from heaven and the afterlife

noun: the abode of mortals (as contrasted with Heaven or Hell)

"It was hell on earth."

noun: the 3rd planet from the sun; the planet we live on

"The Earth moves around the sun."

noun: the solid part of the earth's surface

"The earth shook for several minutes."

noun: the loose soft material that makes up a large part of the land surface

"They dug into the earth outside the church."

noun: once thought to be one of four elements composing the universe (Empedocles)

verb: connect to the earth

"Earth the circuit."

verb: hide in the earth like a hunted animal