Entry 1 sense Webster, 1913 Ansa /(ăn"sȧ)/ · An·sa · IPA /ˈæn.sə/ 01 n. A name given to either of the projecting ends of Saturn's ring. pl. Ansæ ((ăn"sǣ)) 1. A name given to either of the projecting ends of Saturn's ring.(Astron.)