grounding

1. Fundamental knowledge or background in a field or discipline. (countable, uncountable)
2. The return to a fully conscious state after a psychedelic experience. (countable, uncountable)
3. The collision of a ship with ground beneath the surface of the water. (countable, uncountable)
4. The prevention of aircraft takeoff because of government action. (countable, uncountable)
5. The interconnecting metal chassis or frame of a device, appliance, machine, or metal raceway via a designated conductor to earth at the service panel. It may be bare or covered, and does not carry current in normal operation. (countable, uncountable)
6. The absorption of energy through visualized roots descending from oneself into the ground, using chi. (countable, uncountable)
7. The act by which a child is grounded (forbidden from going out, using electronics, etc.). (countable, uncountable)
8. The background of embroidery, etc. (countable, uncountable)

Plural groundings