Definitions

1. adjective

completely without anything, such as clothes, covering, or support

“She wore a sheer dress to the party, showing off her legs.”

2. noun

the outer layer of the atmosphere, extending from about 50 to 500 kilometers above the earth

“The stars shone through the sheer, a breathtaking sight in the desert night.”

3. noun

a steep or almost vertical rock face, especially one with a vertical or overhanging part

“The climbers encountered a sheer rock wall on their way to the summit.”