| 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. |
propagation prop·a·ga·tion (prŏp'ə-gā'shən)
n.
Multiplication or increase, as by natural reproduction.
The act or process of propagating, especially the process by which an impulse is transmitted along a nerve fiber.