mkha' dbyings

མཁའ་དབྱིངས
spacious sky [RB]

the realm of space, [the expanse of the] sky, space, horizon, heavenly expanse [IW]

gsal stong thugs kyi mkha' dbyings - the sky-expanse of your empty, luminous mind [RY]

whole compass or extent of the heavens, sky, expanse of the sky [JV]

the sky; sky. the realm of space, the expanse of the sky, space, horizon, heavenly expanse; spacious sky [RY]