<p><strong>Verb (used with object):</strong></p><ul><li>To apply some oily or greasy substance to (a machine, parts of a mechanism, etc.) in order to diminish friction; oil or grease (something).</li><li>To make slippery or smooth; apply a lubricant to: to lubricate one's hands with a lotion.</li><li>To smooth over, as a difficulty or human relationship; ease: to lubricate the friction between enemies.</li><li>Slang: to provide with intoxicating drinks.</li><li>Slang: to bribe.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>To act as a lubricant.</li><li>To apply a lubricant to something.</li></ul>