- the act of traveling or migrating slowly or with difficulty, as through rough or unsettled territory: Arduous trekking through the Alleghenies caused their Conestoga wagons to break down again and again.
- the act of hiking long distances as a recreational activity, especially over rough terrain: The three hours of hard trekking over the tough trail is worth it for the splendid view of the valley.
- the act of making a relatively short but difficult or burdensome trip: I moved back into a city apartment because I got tired of all the trekking back and forth and the aggravation of having a house and car.
- traveling, migrating, or hiking over rough terrain, or making any other difficult or burdensome trip: The overuse of resources by trekking tourists is contributing to environmental harm in Nepal and elsewhere.
