n.
Function: noun
Etymology: Middle English, from Anglo-French baee opening, from feminine of baé, past participle of baer to be wide open, gape, from Vulgar Latin *batare
Date: 14th century
1 : a principal compartment of the walls, roof, or other part of a building or of the whole building
2 : a main division of a structure
3 : any of various compartments or sections used for a special purpose (as in an airplane, spacecraft, or service station) <a bomb bay > <a cargo bay >
4 : BAY WINDOW 1
5 : a support or housing for electronic equipment