Meaning of “sheer” - Learner’s Dictionary

sheer

adjective uk us /ʃɪər/
EXTREME [ always before noun ]

used to emphasize how strong a feeling or quality is:

a look of sheer delight/joy
sheer determination/hard work
LARGE [ always before noun ]

used to emphasize the large size or amount of something:

The delays are due to the sheer volume of traffic.
STEEP

very steep:

a sheer cliff face
CLOTH

Sheer cloth is very thin and you can see through it:

sheer tights/nylons

(Definition of “sheer” from the Cambridge Learner’s Dictionary © Cambridge University Press)