ground

(n.) 1) the broad, flat thing that would kill you if you fell from a great height. the thing you are most likely standing on whenever gravity works as intended; 2) the dead remains of coffee

(v.) 1) to confine a young person to their room, as punishment for misbehavior; 2) to confine electric currents to an equalized surface, as punishment for trying to zap people

ground is a lot of things, it transpires.