bay window

American  

noun

1. an alcove of a room, projecting from an outside wall and having its own windows, especially one having its own foundations.

2. Informal. a large, protruding belly; paunch.

---

bay window British  

noun

1. Sometimes shortened to: bay.  a window projecting from the wall of a building and forming an alcove of a room See also bow window oriel window

---

Etymology

Origin of bay window

late Middle English word dating back to 1400–50

Example Sentences

See Examples For:

bay window

The front bay window appeared to have been completely blown out, with debris including plants, wooden shutters and glass scattered across the street.

From BBC ● Jun. 17, 2025

Adding further drama is a giant bay window in the living room that overlooks the backyard.

From Los Angeles Times ● Feb. 26, 2024

By March 5, Mr. Rice noticed the bay window in his living room was cracking from the weight of the snow.

From New York Times ● Mar. 15, 2023

Relatively few people are old enough to recall this unpretentious 1906 home, with charming third-floor gables and a second-floor bay window.

From Seattle Times ● Mar. 3, 2022

I was reaching for a puzzle part that was just blue sky when a flash of light filled the bay window.

From "A Long Way from Chicago" by Richard Peck