Grade 0 waterway Get Printable Handwriting (wa-ter-way) 3 syllables Rhymes Learn It! Spelling Test Definition noun. 1 a navigable body of water 2 a conduit through which water flows Example Sentence The boat floated down the waterway. Synonyms river; canal; navigable channel of water Antonyms land Rhymes Three Syllable Rhymes (1) waterway Share with your friends: