transom

[ tran-suh m ]
/ ˈtræn səm /
|

noun

a crosspiece separating a door or the like from a window or fanlight above it.
Also called transom light, transom window. a window above such a crosspiece.
a crossbar of wood or stone, dividing a window horizontally.
a window so divided.
Nautical.
  1. a flat termination to a stern, above the water line.
  2. framework running athwartships in way of the sternpost of a steel or iron vessel, used as a support for the frames of the counter.
Artillery. a metal piece connecting the sidepieces of the tail or the cheeks of a gun carriage.

Origin of transom

1325–75; late Middle English traunsum, traunsom, Middle English transyn, probably alteration (by association with trans-) of traversayn < Old French traversin crosspiece, derivative of travers breadth; see traverse
Related formstran·somed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for transom

British Dictionary definitions for transom

transom

/ (ˈtrænsəm) /

noun

Also called: traverse a horizontal member across a windowCompare mullion
a horizontal member that separates a door from a window over it
the usual US name for fanlight
nautical
  1. a surface forming the stern of a vessel, either vertical or canted either forwards (reverse transom) or aft at the upper side
  2. any of several transverse beams used for strengthening the stern of a vessel
Derived Formstransomed, adjective

Word Origin for transom

C14: earlier traversayn, from Old French traversin, from traverse
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for transom

transom


n.

mid-14c., transeyn "crossbeam spanning an opening, lintel," probably by dissimilation from Latin transtrum "crossbeam" (especially one spanning an opening), from trans- "across" (see trans-) + instrumental suffix -trum. Meaning "small window over a door or other window" is first recorded 1844.

Online Etymology Dictionary, © 2010 Douglas Harper