Define depreciate: to lower in honor or esteem; to lower the price or estimated value of â depreciate in a sentence to lower in honor or esteem; to lower the price or estimated value ofâ¦ See the full definition
Definition of 'grease'. grease. Grease is a thick, oily substance which is put on the moving parts of cars and other machines in order to make them work smoothly. ...grease-stained hands. If you grease a part of a car, machine, or device, you put grease on it in order to make it work smoothly.
Grease is generally used for: 1  Machinery that runs intermittently or is in storage for an extended period of time. Because grease remains in place, a lubricating film can instantly form. 2  Machinery that is not easily accessible for frequent lubrication.