transom

noun

tran·​som ˈtran(t)-səm 

1

: a transverse piece in a structure : crosspiece: such as

a

: lintel

b

: a horizontal crossbar in a window, over a door, or between a door and a window or fanlight above it

c

: the horizontal bar or member of a cross or gallows

d

: any of several transverse timbers or beams secured to the sternpost of a boat

also : the planking forming the stern of a square-ended boat

2

or transom window : a window above a door or other window built on and commonly hinged to a transom

Illustration of transom

• T transom 2

see also over the transom

Examples of transom in a Sentence

Recent Examples on the Web

The galley style kitchen is filled with light thanks to the transom windows above the countertop and two glass doors leading outside on either end. —Felicia Feaster, AJC.com, 8 Jan. 2026

Doors still have transom windows. —Roger Naylor, AZCentral.com, 14 Nov. 2025

As Washington was still digesting the election results on Thursday, a fund-raising e-mail came across the transom from Jasmine Crockett, a Texas Democratic congresswoman who has emerged as one of the Party’s louder TV warriors. —Susan B. Glasser, New Yorker, 6 Nov. 2025

At the stern, meanwhile, a dual-mode transom combines a garage, a submersible platform, and a beach club into one single system. —Rachel Cormack, Robb Report, 7 Oct. 2025

Word History

Etymology

Middle English transyn, traunsom, probably alteration of traversayn, from Middle French travessain, from Old French traversain set crosswise, from Vulgar Latin *traversanus, from Latin transversus transverse

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for transom

• handsome
• hansom

Kids Definition

transom

noun

tran·​som ˈtran(t)-səm 

1

: a horizontal crossbar in a window, over a door, or between a door and a window or fanlight above it

2

: a window above a door or other window built on and commonly hinged to a transom