|Language:||Old North French|
|Origin:||decaïr, from Late Latin decadere 'to fall, sink'|
1 [intransitive and transitive]
to be slowly destroyed by a natural chemical process, or to make something do this [↪ rot]:
Her body was already starting to decay.
Most archaeological finds are broken, damaged, or decayed.
decaying organic matter
if buildings, structures, or areas decay, their condition gradually becomes worse:
Hundreds of historic buildings are being allowed to decay.
Britain's decaying inner cities
if traditional beliefs, standards etc decay, people do not believe in them or support them any more [= decline]:
In Orthodox Europe, mass religion seems to have decayed less.