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Definition of transom

transom

/ˈtræn.səm/
tran · som

Plural:transoms
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transom Lexical Profile

transom Game Scores & Validity

• noun

1

A horizontal crossbar or strengthening beam in a window or above a door, separating the door from a small window above it.

Example

"The carpenter replaced the rotting wooden transom above the front entrance."


2

American A small, often hinged window situated directly above a door or larger window to provide ventilation and light.

Example

"She propped open the glass transom to let a cool breeze circulate through the hallway."


3

The flat surface or horizontal structural timber forming the stern of a boat or ship.

Example

"We mounted the outboard motor securely onto the boat's reinforced transom."

Synonyms
View all synonyms for transom

Word Nuance & Usage

In architecture, a transom is a horizontal structural crossbar, whereas a mullion is a vertical bar dividing a window.

• Rhymes for transom

Word Origin & Etymology

Middle English, likely an alteration of Old French 'traversin' (crossbeam), from Latin 'transversum' (something lying across).

Cite this Entry


Wordmom. (2026). Definition of Transom. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/transom
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