Definitions

1. adjective

making or characterized by a hissing or rustling sound, especially when vowels are pronounced with the tongue between the teeth

“The sibilant sound of the wind through the trees was eerie.”

2. noun

a person who speaks with a hissing or rustling sound, especially when pronouncing vowels

“The comedian’s sibilant delivery added to the comedic effect.”

3. noun

a hissing or rustling sound, especially when vowels are pronounced with the tongue between the teeth

“The sibilant sound of the snake slithering through the grass startled her.”