| a. | 1. | Making a hissing sound; uttered with a hissing sound; hissing; |
| Noun | 1. | sibilant - a consonant characterized by a hissing sound (like s or sh) Synonyms: sibilant consonant |
| Adj. | 1. | sibilant - of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then') |