| all clear | |
| —n | |
| 1. | a signal, usually a siren, indicating that some danger, such as an air raid, is over |
| 2. | an indication that obstacles are no longer present; permission to proceed: he received the all clear on the plan |
| 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. |