Used to describe the point furthest west in a geographic location, area or region.

Geographic Orientation

It's not used for giving directions in daily life, but for describing locations in a broader context.

Not for Directions

Implies comparison within a group; the term is relative to the other positions being discussed.

Relative Position

 the westernmost group. So I started contacting them -- because they had actually given me a permit to do this -- and I said, "I want to come up and tell you what we found." And for some reason they didn't want me to come, or it was hard to find a time and a place, and it took a while, but finally they said, "Okay, you can come.

Greg Stone: Saving the...

 Now that contrast is really harsh as you move across the westernmost section of the Grand Canyon. And the thing about the canyon, too, is that you'd think that the further out you get and the closer to the end you get,

Westernmost