The Collaborative International Dictionary of English v.0.48:
5 \5\ adj. 1. one more than four; denoting a quantity consisting of five items or units; -- representing the number five as an Arabic numeral. Syn: five, v [WordNet 1.5 +PJC]WordNet (r) 3.0 (2006):
5 adj 1: being one more than four [syn: five, 5, v] n 1: the cardinal number that is the sum of four and one [syn: five, 5, V, cinque, quint, quintet, fivesome, quintuplet, pentad, fin, Phoebe, Little Phoebe]