Entry 1 sense Webster, 1913 Sursolid · Sur·sol·id · IPA /sɜː(ɹ)ˈsɒlɪd/ 01 n. The fifth power of a number; as, a� is the sursolid of a, or 32 that of 2. 1. The fifth power of a number; as, a� is the sursolid of a, or 32 that of 2.(Math.) [R.]