What do you think a caboose is without looking it up😄?

In the old days it was the last car at the end of a train. It usually had quarters for the train's conductor.

Pouch to hold a baby in. Mothers often have them so babies are close to their chest and they don’t have to hold them. 

Railway carriage but not for passengers. Possibly the rear one, what we call the “guard’s van” in English.

It’s the rear end of a train or the last car in a train. 

It’s a butt. 

a type of bridge?,  nah that's wrong..  i've heard of it but forgotten like i do with many things

The signal man's litttle car at the end of a frieght train. 

yeah, I thought it was that.

Is it a cousin of the moose?

Is it a part of a cold-fusion engine?

Okay, I'll play. :) It's either a cow or a backside.