define; percolating
percolate percolate. 1  to cause (a liquid) to pass through a porous body; filter. ( 2 of a liquid) to filter through; permeate. 3  to brew (coffee) in a percolator. 4  to pass through a porous substance; filter; ooze; seep; trickle. 5  to become percolated: The coffee is starting to percolate. 6  to become active, lively, or spirited.