正确的文法是： What does the word "commuter" mean? Commuter 是名词(你已经有例子) 也是形容词 - commuter train (市郊往返列车从来不准点。The commuter train is never on time.)

Commuter is someone who regularly travels between work and home or in any destinations. Example: The streets will be full of commuters after the holidays.

I guess it's a person that travels from one place to another regularly, usually at the same time (for example, from one's residence to an office or college)

A commuter is traveller, travelling by car, bus or train from A to B. Example: The commuter missed his morning train and was late for work.