Entry 5 senses · 3 variants Webster, 1913 Swish /swĭsh/ · IPA /swɪʃ/ v. t. v. i. n. 01 v. t. To flourish, so as to make the sound swish. 1. To flourish, so as to make the sound swish. 2. To flog; to lash.[Slang] 02 v. i. To dash; to swash. 1. To dash; to swash. 03 n. A sound of quick movement, as of something whirled through the air. 1. A sound of quick movement, as of something whirled through the air.[Colloq.] 2. Light driven spray.(Naut.) [Eng.]