8(n = noun.quantity) eight, eighter, eighter from decatur, octad, octet, octonary, ogdoad, viii - the cardinal number that is the sum of seven and one;
is a kind of digit, figure
8(s = adj.all) eight, viii - being one more than seven;
one more than seven; denoting a quantity consisting of eight items or units; -- representing the number eight as an Arabic numeral [WordNet 1.5]
8 may 1945, atomic number 8, cluster of differentiation 8, december 8