Definitions for atrophy
atrophy, wasting, wasting away(noun)
a decrease in size of an organ caused by disease or disuse
any weakening or degeneration (especially through lack of use)
"Muscles that are not used will atrophy"
A reduction in the functionality of an organ caused by disease, injury or lack of use.
To wither or waste away.
a wasting away from want of nourishment; diminution in bulk or slow emaciation of the body or of any part
to cause to waste away or become abortive; to starve or weaken
to waste away; to dwindle
U.S. National Library of Medicine
Decrease in the size of a cell, tissue, organ, or multiple organs, associated with a variety of pathological conditions such as abnormal cellular changes, ischemia, malnutrition, or hormonal changes.