celeritous Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. quick or speedy in movement. Example Sentence The celeritous bicyclist almost knocked Trudy down. More Example Sentences He moved in a celeritous manner. Synonyms swift; fast; speedy Antonyms slow; sluggish; leisurely Hear It! Say It! Write It! celeritous Switch to cursive Start Share with your friends: