GND meaning in Space Science ?

What is Ground mean?

Ground may refer to:

Soil, a mixture of clay, sand and organic matter present on the surface of the EarthGround (electricity), the reference point in an electrical circuit from which voltages are measuredEarthing system, part of an electrical installation that connects with the Earth's conductive surfaceGround and neutral, closely related termsGround (often grounds), in law, a rational motive or basis for a belief, conviction, or action taken, such as a legal action or argument:Grounds for divorce, regulations specifying the circumstances under which a person will be granted a divorceCoffee grounds, ground up coffee beansGround bass, in music, a bass part that continually repeats, while the melody and harmony over it changeGround tissue, one of the three types of tissue systems in a plantGround term, in symbolic logic, a term with no variablesGround (unit), a unit of area used in IndiaGround (Dzogchen), the primordial state in DzogchenThe Ground, a 2005 album by Norwegian jazz pianist Tord GustavsenGround (album), the second album by the Nels Cline Trio"Ground" (song), one of the songs in the debut album of the Filipino rock band RivermayaGround surface, often on metals, created by various grinding operationsGround (cricket), where cricket games are played, and also part of the playing area. reference