2. sibilant of or pertaining to a consonant sound in which air is channeled through a narrow groove along the center of the tongue, producing a hissing sound.
3. (n.)sibilant a sibilantconsonant sound, as (s), (z), (sh), or (zh).
Etymology: (1660–70; < L sībilant-, s. of sībilāns, prp. of sībilāre to hiss, der. of sībilus a hissing, whistling; see -ant)
Definition of 'sibilant'
Princeton's WordNet
1. (adj)sibilant, sibilant consonant a consonant characterized by a hissing sound (like s or sh)
2. (adj)fricative, continuant, sibilant, spirant, strident of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then')
Definition of 'sibilant'
Webster Dictionary
1. (adj)sibilant making a hissing sound; uttered with a hissing sound; hissing; as, s, z, sh, and zh, are sibilant elementary sounds
Definitions of sibilant 
