Wiktionary
vb. (present participle of gray out English)
Usage examples of "graying out".
She reeled in her saddle, actually graying out as Kris steadied her.
His vision graying out, he saw two shapes melt and whirl together, black and ivory in the lamplight.
Bird Dog tightened his stomach and torso muscles, forcing blood up from his extremities into his brain to prevent graying out.
An error in judgment by the pilot could have troops graying out from the gee-forces, or plowing into the dirt.
She felt herself graying out and bared her teeth as she hung on to him.
They were graying out with perceptible speed as evening advanced across the sky outside.
Valley View's iron portals were smashed down and within seconds, a holy wave of living-dead arms, legs and innards were airborne and graying out the sunlight.
She looked around, but her vision was full of stars and graying out on the edges.