Wordnet 3.0
NOUN (1)
1.
a close friend who accompanies his buddies in their activities;
[syn: buddy, brother, chum, crony, pal, sidekick]
WordNet (r) 3.0 (2006):
buddy
n 1: a close friend who accompanies his buddies in their
activities [syn: buddy, brother, chum, crony,
pal, sidekick]