su·sur·rus Pronunciation: so͝oˈsərəs/ Part of speech: noun, literary Definition: A whispering, murmuring, or rustling, especially of water, trees or grasses. "the gentle susurrus of the oaks in the breeze" Susurus Pronunciation: see susurrus; typing those marks is a pain Part of speech: proper noun Definition: An often quiet guy on Imgur. Trying to be a little louder when he needs to. "Susurus? Never heard him."