From WordNet (r) 3.0 (2006) [wn]:
lucky
adj 1: occurring by chance; "a lucky escape"; "a lucky guess"
2: having or bringing good fortune; "my lucky day"; "a lucky
man" [ant: luckless, unlucky]
3: presaging or likely to bring good luck; "a favorable time to
ask for a raise"; "lucky stars"; "a prosperous moment to make
a decision" [syn: golden, favorable, favourable,
lucky, prosperous]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Lucky \Luck"y\, a. [Compar. Luckier; superl. Luckiest.]
1. Favored by luck; fortunate; meeting with good success or
good fortune; -- said of persons; as, a lucky adventurer.
" Lucky wight." --Spenser.
[1913 Webster]
2. Producing, or resulting in, good by chance, or
unexpectedly; favorable; auspicious; fortunate; as, a
lucky mistake; a lucky cast; a lucky hour.
[1913 Webster]
We doubt not of a fair and lucky war. --Shak.
Syn: Successful; fortunate; prosperous; auspicious.
[1913 Webster]