lubricant Meaning, Definition & Usage

  1. noun a substance capable of reducing friction by making surfaces smooth or slippery
    lube; lubricating substance; lubricator.

WordNet

Lu"bri*cant adjective
Etymology
L. lubricans, p. pr. of lubricare, See Lubricate.
Definitions
  1. Lubricating.
Lu"bri*cant noun
Definitions
  1. That which lubricates; specifically, a substance, as oil, grease, plumbago, etc., used for reducing the friction of the working parts of machinery.

Webster 1913