sinuous Get Printable Handwriting (sin-u-ous) 3 syllables Learn It! Spelling Test Definition adjective. 1 with many curves or turns; winding; 2 devious; 3 having a wavy edge as a leaf; sinuate. Example Sentence It was a sinuous path to take. Synonyms winding; twisting; devious; tortuous; wavy Antonyms straight; untwisted; unwinding Share with your friends: