verb, -cat⋅ed, -cat⋅ing.| 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. |
| 6. | to act as a lubricant. |
| 7. | to apply a lubricant to something. |
| 8. | Slang. to drink or become drunk. |