adj.
1.of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then') sibilant n.
1.a consonant characterized by a hissing sound (like s or sh)
Idiom of the Day
eager beaver
a person who is always eager to work hard or do extra work
My colleague is an eager beaver and is always ready to work hard when we need him.