| object lesson | |
| —n | |
| 1. | a convincing demonstration of some principle or ideal |
| 2. | (esp formerly) a lesson in which a material object forms the basis of the teaching and is available to be inspected |
| a stew of meat, vegetables, potatoes, etc. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |