| a chattering or flighty, light-headed person. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| countermine | |
| —n | |
| 1. | military a tunnel dug to defeat similar activities by an enemy |
| 2. | a plot to frustrate another plot |
| —vb | |
| 3. | to frustrate by countermeasures |
| 4. | military to take measures to defeat the underground operations of (an enemy) |
| 5. | military to destroy enemy mines in (an area) with mines of one's own |