In architecture, a transom is a transverse horizontal structural beam or bar, or a crosspiece separating a door from a window above it. This contrasts with a mullion, a vertical structural member. [1]

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

Nov 18, 2025 · Transom windows sit over a door or other window on top of a horizontal beam, called a transom. They can be decorative or functional and have been popular since the 14th century.

Sep 17, 2025 · On most boats, the transom is the vertical reinforcement at the stern of the boat. There’s definitely a lot of terminology to learn and remember when boating, so we’re here to tell you more …

Oct 25, 2024 · The transom is structurally tied together with the keel and sides of the boat, making it an important part of the vessel’s overall design and construction. While the terms “ stern ” and “transom” …

TRANSOM definition: a crosspiece separating a door or the like from a window or fanlight above it. See examples of transom used in a sentence.

Jul 28, 2025 · In this guide, you’ll learn exactly what a transom window is, its historical roots, types and design options, benefits, considerations, and FAQ's.

Dec 17, 2024 · In the world of construction, the term transom refers to a horizontal structural element found in doors, windows, or other openings. A transom is typically positioned above the main door or …

TRANSOM definition: 1. a horizontal bar of stone or wood across a window, or separating the top of a window or door…. Learn more.

The transom of a boat is the surface that forms its stern. Her name and port of registration (Jersey) are painted on her transom in navy blue.