—v.t. 1. to apply some oily or greasy substance to (a machine, parts of a mechanism, etc.) in order to diminish friction; oil or grease (something).
2. to make slippery or smooth; apply a lubricant to: to lubricate one's hands with a lotion. 3. to smooth over, as a difficulty or human relationship; ease: to lubricate the friction between enemies. 4. Slang.to provide with intoxicating drinks.
5. Slang.to bribe.
—v.i. 1. to act as a lubricant.
2. to apply a lubricant to something.
3. Slang.to drink or become drunk.