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]

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.

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

Add elegance to your home with a transom window! Explore dozens of ideas, choose the look you want, and then follow simple videos to plan and install.

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.

Nov 25, 2025 · A transom window is a horizontal window positioned above a door or another window, separated by a horizontal beam. Traditionally, it improved ventilation and added light before air …

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.

Apr 22, 2024 · Learn about transom windows from design experts, including their history, types of transom windows, and what installation and replacement cost.

Dec 25, 2024 · A transom in construction refers to a horizontal beam or window positioned above a door or window. The primary purpose of a transom is to divide or provide additional structural support, …

Jan 14, 2026 · Noun transom (plural transoms) (architecture) A crosspiece over a door; a lintel. (architecture) A horizontal glazing bar in a window. A transom window. (nautical) Any of several …