1. Railroad car: This is the most common meaning. A caboose is a small railroad car attached to the end of a train, primarily used for:
* Housing the train crew: It provided a place for the conductor and brakeman to ride, eat, and sleep.
* Observing the train: The caboose had a cupola (small, domed roof) that provided a view of the entire train, allowing the crew to see if anything was wrong.
* Braking the train: Cabooses often contained hand brakes that could be used to help slow or stop the train.
2. Slang: "Caboose" is also slang for the rear end of something, especially a vehicle. It can also be used as slang for the rear end of the human body.
So, when you hear the word "caboose," it's important to consider the context to understand which meaning is intended.