| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| Main Entry: | gaslight |
| Part of Speech: | v |
| Definition: | to manipulate someone into questioning their own sanity; to subtly drive someone crazy |
| Etymology: | 1956 |
| Usage: | slang; gaslighting, n |