atrophy /ˈæt.ɹə.fi/verb 2noun 1forms 3 verb2 •To wither or waste away.Boy. I love summer vacation. I can feel my brain beginning to atrophy already. — 1987 •To cause to waste away or become abortive; to starve or weaken.Cold silence has a tendency to atrophy any sense of compassion — 2001 noun1 •A reduction in the functionality of an organ caused by disease, injury or lack of use. formsatrophied · atrophying · atrophies