ground

1. ground (noun) — sense 1

Definition: The surface of the Earth, as opposed to the sky or water or underground.

Example: Look, I found a ten dollar bill on the ground!

2. ground (noun) — sense 2

Definition: Terrain.

Example: As the terrain-following radar scans the ground ahead of the aircraft the actual clearance height is measured by the radio altimeter.

3. ground (noun) — sense 3

Definition: Soil, earth.

Example: The worm crawls through the ground.

4. ground (verb) — sense 4

Definition: To connect (an electrical conductor or device) to a ground.

Example: These geomagnetically induced currents (GICs) can become a hazard when they flow through conducting infrastructure, usually entering and exiting networks where equipment is grounded to Earth.

5. ground (verb) — sense 5

Definition: To electrocute.

6. ground (verb) — sense 6

Definition: To punish, especially a child or teenager, by forcing them to stay at home and/or give up certain privileges.

Example: If you don't clean your room, I'll have no choice but to ground you.