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| a chattering or flighty, light-headed person. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| signal box | |
| —n | |
| 1. | a building containing manually operated signal levers for all the railway lines in its section |
| 2. | a control point for a large area of a railway system, operated electrically and semiautomatically |