ly·ra \ˈlīrə\noun (-s) Etymology: Latin, lyre, from Greek 1. a.: lira II b.: a glockenspiel with a lyre-shaped frame 2.alsolyre\ˈlī(ə)r, ˈlīə\[New Latin lyra, from Latin]: a triangular area of the ventral surface of the corpus callosum between the posterior pillars of the fornix