Entry 4 senses · 2 variants Webster, 1913 Talus · Ta·lus · IPA /ˈteɪləs/ n. n. 01 n. The astragalus. pl. Tali ((#)) 1. The astragalus.(Anat.) 2. A variety of clubfoot (Talipes calcaneus). See the Note under Talipes.(Surg.) See: Talipes 02 n. A slope; the inclination of the face of a work. 1. A slope; the inclination of the face of a work.(Fort.) 2. A sloping heap of fragments of rock lying at the foot of a precipice.(Geol.)