What is the meaning of Overland?

by or across land, especially of travel

Over, across, or by land.

a trip by land between the UK and the Indian Sub-continent or Australia, or between the UK and South Africa.

to transport (especially sheep or other farm animals) over land

to travel across land

to go on a recreational expedition to a remote destination, often with the aid of an off-road vehicle

Source: wiktionary.org