To release, as from confinement, care, or duty, To apportion (weight) evenly, as over a door, To get rid of a burden, load, or weight, noun_ The amount or rate of emission or ejection, An official document certifying such release, especially from military service, A flowing out; emission; vent_ as, the discharge of water from a river or from an orifice, of blood from a wound, of lightning from a cloud