swishing Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition to move quickly making a whistling or rustling sound; to cause to move with a rustling sound Example Sentence The fish was swishing in the water. Synonyms whiz; whoosh; fizzle; sizzle Antonyms stay still Hear It! Say It! Write It! swishing Switch to cursive Start Share with your friends: