Ground

1. Terrain, soil, earth. The arrow ended up on the bare ground.
2. The surface of the Earth, as opposed to the sky or water or underground.
3. Crushed, or reduced to small particles. Put the coffee grounds in the trash.
4. Process by grinding. They ground the coffee before brewing it.
5. Basis, foundation, legwork. What grounds do you have to accuse her of theft?
6. Background, context, framework, surroundings. He walked around in he school grounds.
7. (electricity) A level of electrical conductor connected to the ground. Tie the wire to a grounded iron rod.
8. To forbid an aircraft or pilot to fly. He was grounded for violations.

9. To gain a basic education (of a particular subject). Jim was well grounded in math.
10. (baseball) To hit a ground ball; to hit a ground ball which results in an out. He grounded out to second in his last at bat.
11. To punish a child or teenager by forcing him/her to stay at home. You are grounded until your grades are better.