Ground

The word ground has several meanings:

The surface of the Earth
Soil, a mixture of sand and organic material present on the surface of the Earth
Ground (electricity), in electrical engineering, something that is connected to the Earth or at the voltage defined as zero (in the U.S., called ground; in the UK, called earth)
In surveying, "ground" refers to a unit of land
In philosophy, socially grounded arguments are those which take as their starting point social conditions
In music, a ground bass is a bass part that continually repeats, while the melody and harmony over it change
In plants, ground tissue is one of the three types of tissue systems in a plant
In lace, the lace ground is the mesh surrounding the design
To punish a disobedient child by prohibiting them from leaving home and/or restricticting other privileges for a specified time period
To prohibit a pilot or airplane from flying
In symbolic logic, a "ground term" is a term with no variables.