{ } n. The quality or state of being sibilant; sibilation. [ 1913 Webster ]

Milton would not have avoided them for their sibilancy, he who wrote . . . verses that hiss like Medusa's head in wrath. Lowell. [ 1913 Webster ]

a. [ L. sibilans, -antis, p. pr. of sibilare to hiss: cf. F. sibilant. ] Making a hissing sound; uttered with a hissing sound; hissing; as, s, z, sh, and zh, are sibilant elementary sounds. -- n. A sibiliant letter. [ 1913 Webster ]

v. t. & i. To pronounce with a hissing sound, like that of the letter s; to mark with a character indicating such pronunciation. [ 1913 Webster ]

n. [ L. sibilatio. ] Utterance with a hissing sound; also, the sound itself; a hiss. [ 1913 Webster ]

He, with a long, low sibilation, stared. Tennyson. [ 1913 Webster ]

a. Hissing; sibilant. [ 1913 Webster ]

a. [ L. sibilus. ] Having a hissing sound; hissing; sibilant. [ R. ] Pennant. [ 1913 Webster ]