(also farthest ) used as superlative of far .
■ adjective situated at the greatest distance.
↘covering the greatest area or distance.
■ adverb
1》 at or by the greatest distance.
2》 over the greatest distance or area.
↘indicating the most distant point reached in a specified direction: it was the ~ north I had ever travelled.
3》 to the most extreme or advanced point.
Origin
ME: formed as a superlative of further .