(weakening in force or intensity; "attenuation in the volume of the sound")
(become less clearly visible or distinguishable; disappear gradually or seemingly; "The scene begins to fade"; "The tree trunks are melting into the forest at dusk")
(lose freshness, vigor, or vitality; "Her bloom was fading")
(disappear gradually; "The pain eventually passed off")
(become feeble; "The prisoner has be languishing for years in the dungeon")