Definitions
1.nounAny very large number, exceeding normal description.
2.numeral(modern British and Australian, short scale) A thousand trillion (logic: 1,000 × 1,000^4): 1 followed by fifteen zeros, 1015.
3.numeral(long scale) A million trillion (logic: 1,000 × 1,000,000^2): 1 followed by twenty-four zeros, 1024.