One of Cantor's Ordinal Numbers , , , ..., , , ...which is ``larger'' than any Whole Number.
See also Aleph-0, Aleph-1, Cardinal Number, Continuum, Ordinal Number, Whole Number
References
Pappas, T. ``Transfinite Numbers.'' The Joy of Mathematics. San Carlos, CA: Wide World Publ./Tetra, pp. 156-158, 1989.