Further commonly means to a greater figurative distance, as in Nothing could be further from the truth, or to a greater extent, as in Let’s discuss this further. It can also mean at or to a greater literal distance. This is what farther most commonly means, as in a few steps farther or two miles farther or We’re moving even farther away. 

The traditional distinction is that farther is used for literal distances and that further should be used for figurative distances or metaphorical extents, though in everyday communication, they are often used interchangeably, with further being often used for literal distances and farther being used to mean at a more advanced point or to a great extent.

However, further is used in a few ways that farther is not. Further can be used as a verb meaning to advance something, such as an agenda or cause, as in This will help to further our cause. As an adjective, further can mean more extended, as in further delays, or additional, as in We will hold further meetings. It can also be used in the beginning of a sentence or clause to mean the same thing as furthermore, in addition, or moreover, as in I don’t like ice cream. Further, I don’t like pistachios. So why would you buy me pistachio ice cream? 

You can remember that farther is typically used for literal distance by remembering that it’s the comparative form of the adjective far, with the superlative form being farthest.

Here’s an example of further and farther used correctly in the same sentence.

Example: I have to drive farther than usual for work today—I’ll explain further when I get home.

Want to learn more? Go the distance by reading the full breakdown of the difference between further and farther.

Should further or farther be used in the following sentence?

They are doing this simply to _____ their agenda.