Definition of macerating:
(v) :
To soften (something) or separate it into pieces by soaking it in a heated or unheated liquid.
(v) :
To reduce solids to small pieces (in a macerator).
(n) :
A macerated substance.
(v) :
(archaic) To make lean; to cause to waste away.
(v) :
(obsolete) To subdue the appetite by poor or scanty diet; to mortify.
(v) :
(obsolete) To mortify the flesh in general.