| logical constant | |
| —n | |
| one of the connectives of a given system of formal logic, esp those of the sentential calculus, not, and, or, and if … then … | |
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| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |