The Collaborative International Dictionary of English v.0.48:
30 \30\ adj. 1. one more than twenty-nine; three times ten; denoting a quantity consisting of thirty items or units; -- representing the number thirty as an Arabic numeral. Syn: thirty, xxx [WordNet 1.5 +PJC]WordNet (r) 3.0 (2006):
30 adj 1: being ten more than twenty [syn: thirty, 30, xxx] n 1: the cardinal number that is the product of ten and three [syn: thirty, 30, XXX]