| Main Entry: | know by heart |
| Part of Speech: | v |
| Definition: | to learn by committing to memory |
| Example: | Think of how many poems, songs, and Bible sayings that you know by heart. |
| Etymology: | 1855 |
| Usage: | idiom |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| the offspring of a zebra and a donkey. |