IPA: //ˈrɛd.kæp//
KK: /ˈrɛdˌkæp/
A person who carries luggage or bags, especially at a train station.
The redcap helped us with our heavy bags at the train station.
Redcap is formed from "red" (from Old English "read", meaning the color red) and "cap" (from Old English "cæppe", meaning a head covering). The word "redcap" refers to a person or creature wearing a red cap, often associated with folklore or specific roles.
Think of the color 'red' and a 'cap' as a head covering — that's why a redcap is someone who wears a red cap.