1 - The surface of the Earth, as opposed to the sky or water or underground.
2 - Terrain.
3 - Soil, earth.
1 - To connect (an electrical conductor or device) to a ground.
2 - To punish, especially a child or teenager, by forcing him/her to stay at home and/or give up certain privileges.
3 - To forbid (an aircraft or pilot) to fly.





