noun
Refers to a physical covering for the face, such as a surgical mask, dust mask, or costume mask.
花粉症の季節はマスクが手放せない。
During hay fever season, I can't go without a mask.
仮装パーティーでマスクをかぶった
I wore a mask at the costume party.
noun
Used to describe a person's facial appearance or features, often in a slightly literary or figurative way.
彼女は整ったマスクをしている。
She has well-defined features.
noun
Technical term in electronics and circuit manufacturing, referring to a pattern used for etching or lithography.
この工程ではフォトマスクを使う。
This process uses a photomask.