A bay window is a window that projects outward from the wall. A wide bay window.
It gathers more light and gives a view along the street as well as across it. A bay window adds floor space and is the first thing to leak when the roof over it fails.
1nounbay windowA window that projects outward from the wall.
“The bay window took the whole front of the room.”
bay window is a window.
Bay plus window, where bay meant an opening between columns.
Middle English
baywyndow
English, today
bay window
From Middle English baywyndow, baywyndowe, bay-windowe, equivalent to bay + window where bay refers to an opening between columns.
Etymology from Wiktionary, CC BY-SA
Practised in Buildings & Architecture