Definition of unmask
1 : to reveal the true nature of : expose
2 : to remove a mask from
: to remove one's mask
Examples of unmask in a sentence
He was unmasked as a spy.
<the killer's identity won't be unmasked until the season's final episode>
First Known Use of unmask
UNMASK Defined for English Language Learners
Definition of unmask for English Language Learners
: to reveal the true identity or nature of (someone or something)
Seen and Heard
What made you want to look up unmask? Please tell us where you read or heard it (including the quote, if possible).