All 6 Uses of

sheer
in
The Princess Bride

But still, There was no doubt that he was, in spite of the sheerness of the Cliffs, heading in an upward direction.†
p. 117.6 *

Rising straight and sheer from the water, a thousand feet into the night.†
p. 109.2

The man in black was hanging in space, clinging to the sheer rock face, seven hundred feet above the water.†
p. 116.7

And so, frozen in thought, he continued to stare up the sheer face of the Cliffs.†
p. 186.9

The ravine grew increasingly sheer as they went along, and Westley soon realized that whereas once he probably could have helped her through the climb, now there was simply no way of doing so.†
p. 193.1

A quick glance up the sheer ravine sides ruled out any possibility of his getting Buttercup past the climb.†
p. 198.9

Definitions:

(1) (sheer as in: a sheer blouse)
typically of fabric: very thin and delicate -- often transparent
(2) (sheer as in: sheer fun)
complete or pure -- without restriction, qualification, or other elements (used for emphasis)
(3) (sheer as in: a sheer cliff)
so steep it is almost vertical
(4) (sheer as in: sheer to the left)
change direction; or to cause such a change of direction -- usually abruptly
(5) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

Sheer can also be an alternative spelling for shear (to cut).