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
pull the plug on (someone or something)
to expose someone`s secret activities
The company pulled the plug on the salesman after they learned about his illegal sales activities.