Source : Webster's Revised Unabridged Dictionary (1913)

Lubricate \Lu"bri*cate\, v. t. [L. lubricatus, p. p. of
   lubricare to lubricate. See {Lubric}.]
   1. To make smooth or slippery; as, mucilaginous and
      saponaceous remedies lubricate the parts to which they are
      applied. --S. Sharp.

            Supples, lubricates, and keeps in play, The various
            movements of this nice machine.       --Young.

   2. To apply a lubricant to, as oil or tallow.

Source : WordNet®

lubricate
     v 1: have lubricating properties; "the liquid in this can
          lubricates well"
     2: apply a lubricant to; "lubricate my car" [syn: {lube}]
     3: make slippery or smooth through the application of a
        lubricant; "lubricate the key"