Entry 1 sense Webster, 1913 Anfractuous · An·frac·tu·ous · IPA /ænˈfɹæktʃʊəs/ 01 a. Winding; full of windings and turnings; sinuous; tortuous; as, the anfractuous spires of a horn. 1. Winding; full of windings and turnings; sinuous; tortuous; as, the anfractuous spires of a horn.