A porter is someone who carries luggage for tourists. If you ever travel by train across the country, you'll be grateful to the porter.
The person at an airport, train station, or hotel who's paid to help with your luggage is a porter. It's also the name of a train employee who assists passengers traveling in sleeper cars. The word porter comes from the Latin portatorem, one who carries. The dark, sweet beer known as porter or porter's ale comes from the same root word — because its taste and low price was the favorite of porters and other laborers.