Definitions for waning
a gradual decrease in magnitude or extent
"the waning of his enthusiasm was obvious"; "the waxing and waning of the moon"
(of the Moon) pertaining to the period during which the visible surface of the moon decreases
"after full moon comes the waning moon"
The fact or act of becoming less or less intense.
the waning of her energy
The fact or act of becoming smaller.
the waning of the moon
Becoming weaker or smaller.
his waning strength
Especially of the lunar phase as it shrinks when viewed from the Earth.
the waning moon
Origin: From wane + -ing.
the act or process of waning, or decreasing