The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Percolate \Per"co*late\, v. i.
   To pass through fine interstices; to filter; as, water
   percolates through porous stone.
   [1913 Webster]

WordNet (r) 3.0 (2006):

percolate
    n 1: the product of percolation
    v 1: permeate or penetrate gradually; "the fertilizer leached
         into the ground" [syn: leach, percolate]
    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:
       percolate, sink in, permeate, filter]
    6: gain or regain energy; "I picked up after a nap" [syn: perk
       up, perk, percolate, pick up, gain vigor]