From WordNet (r) 2.0 (August 2003) [wn]:
7
adj : being one more than six [syn: seven, vii]
n : the cardinal number that is the sum of six and one [syn:
seven, VII, sevener, heptad, septet]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
7 \7\ adj.
One more than six; constituting or denoting a quantity
consisting of seven items or units; -- representing the
number seven as an Arabic numeral.
Syn: seven, vii
[WordNet 1.5 +PJC]