Disappearing from sight or from existence.

Disappearing.

that vanishes or disappears.

That disappears, or is in the process of disappearing, from sight or existence; vanishing.

gen. Dissolving, disappearing, or melting away (literally or figuratively); tending or liable to do this. Frequently humorous.

Relinquishing; (also) that is relinquished or given up. Obsolete. rare.