ground

Dictionary definition · ground

the solid part of the earth's surface"the plane turned away from the sea and moved back over land"
a rational motive for a belief or action"the reason that war was declared"
the loose soft material that makes up a large part of the land surface"they dug into the earth outside the church"
a relation that provides the foundation for something"they were on a friendly footing"
a position to be won or defended in battle (or as if in battle)"they gained ground step by step"
the part of a scene (or picture) that lies behind objects in the foreground"he posed her against a background of rolling hills"

fix firmly and stably"anchor the lamppost in concrete"
confine or restrict to the ground"After the accident, they grounded the plane and the pilot"
place or put on the ground
instruct someone in the fundamentals of a subject
bring to the ground"the storm grounded the ship"
hit or reach the ground

Source: Open English WordNet (CC BY 4.0).