[tran-suhm] 
| 1. | a crosspiece separating a door or the like from a window or fanlight above it. |
| 2. | Also called transom light, transom window. a window above such a crosspiece. |
| 3. | a crossbar of wood or stone, dividing a window horizontally. |
| 4. | a window so divided. |
| 5. | Nautical.
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| 6. | Artillery. a metal piece connecting the sidepieces of the tail or the cheeks of a gun carriage. |