Definition of "lubricator" [lu•bri•ca•tor]

• One that lubricates, especially a lubricant. (noun)
• A device for applying a lubricant. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The "lubricator" now being used on nearly all the railroad engines in the United States was invented by a colored man, Mr.E. McCoy, of Detroit, Michigan."
• "(This is done to make certain that no back-fire will occur), then to on lubricator."
• "In the good old days, when the brethren were united against the Soviet devil, all shared equally in the drug-running trade, under the benevolent eye of that great lubricator of illicit commerce, the CIA."