Source : Webster's Revised Unabridged Dictionary (1913)

Percolate \Per"co*late\, v. t. [imp. & p. p. {Percolated}; p.
   pr. & vb. n. {Percolating}.] [L. percolatus, p. p. of
   percolare to percolate; per through + colare to strain.]
   To cause to pass through fine interstices, as a liquor; to
   filter; to strain. --Sir M. Hale.

Percolate \Per"co*late\, v. i.
   To pass through fine interstices; to filter; as, water
   percolates through porous stone.

Source : WordNet®

percolate
     n : the product of percolation
     v 1: permeate or penetrate gradually; "the fertilizer leached
          into the ground" [syn: {leach}]
     2: spread gradually; "Light percolated into our house in the
        morning"
     3: prepare in a percolator; "percolate coffee"
     4: cause (a solvent) to pass through a permeable substance in
        order to extract a soluble constituent
     5: pass through; "Water permeates sand easily" [syn: {sink in},
         {permeate}, {filter}]
     6: gain or regain energy; "I picked up after a nap" [syn: {perk
        up}, {perk}, {pick up}, {gain vigor}]