Caboose n. : A house on deck, where the cooking is done; -- commonly called the galley.

Caboose n. : A car used on freight or construction trains for brakemen, workmen, etc.; a tool car.

Example:
What was the original function of the "Caboose" and why are they not used anymore?

Taxonomy
caboose, train, cupola, cupola caboose, cars, railroads, bay window, Railroad caboose, freight trains, little red caboose, crew, train crew, rear, conductor, extended vision, brake vans, platform, locomotives.

Defination from the web:
caboose at the end of a train entering Eola Yard, Aurora, Illinois, in 1993. ... The conductor kept records and handled business from a table or desk in the caboose. ...