outflow Get Printable Handwriting (out-flow) 2 syllables Rhymes Learn It! Spelling Test Definition noun. the act of flowing out; a stream of fluid or gas that flows out Example Sentence The outflow of water from the faucet was strong. Synonyms stream; discharge; efflux Antonyms inflow; influx Rhymes Two Syllable Rhymes (1) outflow Share with your friends: