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 ]
n. [ F. simulation, L. simulatio. ] The act of simulating, or assuming an appearance which is feigned, or not true; -- distinguished from dissimulation, which disguises or conceals what is true. [ 1913 Webster ]