'Lubricant' definitions:

Definition of 'lubricant'

From: WordNet
noun
A substance capable of reducing friction by making surfaces smooth or slippery [syn: lubricant, lubricator, lubricating substance, lube]

Definition of 'Lubricant'

From: GCIDE
  • Lubricant \Lu"bri*cant\, a. [L. lubricans, p. pr. of lubricare, See Lubricate.] Lubricating. [1913 Webster]

Definition of 'Lubricant'

From: GCIDE
  • Lubricant \Lu"bri*cant\, n. That which lubricates; specifically, a substance, as oil, grease, graphite, etc., used for reducing the friction of the working parts of machinery. [1913 Webster]