From WordNet (r) 3.0 (2006):
thousand
adj 1: denoting a quantity consisting of 1,000 items or units
[syn: thousand, one thousand, 1000, m, k]
n 1: the cardinal number that is the product of 10 and 100 [syn:
thousand, one thousand, 1000, M, K, chiliad,
G, grand, thou, yard]