Definition of transoms:
(n) :
(architecture) A crosspiece over a door; a lintel.
(n) :
(architecture) A horizontal glazing bar in a window.
(n) :
A transom window.
(n) :
(nautical) The flat or nearly flat stern of a boat or ship.
(n) :
(nautical) Any of several transverse structural members in a ship, especially at the stern; a thwart.
(n) :
(figuratively, usually attributively) Items that have arrived over the transom.