Someone who travels for travel's sake, with or without objective; someone who spends most time "on the road".

A pushchair with detachable carrycot or car seat.

plural of travel system

travel through space in order to visit and explore other worlds

(chiefly science fiction) Hypothetical or fictional travel to the past or the future, typically by means of a machine (a time machine) or a wormhole.

One who engages in time travel.

One who travels together with another. / (US) One who sympathizes with the aims or beliefs of an organization without belonging to it; most often applied to a Communist sympathizer.

A man who travels, often within a certain territory, soliciting orders or selling goods.

expenditure incurred by an employee on account of a journey on official business

plural of time-traveller