luck·y1 Audio Help /ˈlʌki/ Pronunciation Key - Show Spelled Pronunciation[luhk-ee] Pronunciation Key - Show IPA Pronunciation
–adjective, luck·i·er, luck·i·est. 1. having or marked by good luck; fortunate: That was my lucky day.
2. happening fortunately: a lucky accident.
3. bringing or foretelling good luck, or supposed to do so: a lucky penny.
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[Origin: 1495–1505; luck + -y1]
—Related forms
luck·i·ness, noun
—Synonyms 1. favored. See fortunate. 3. auspicious, propitious, favorable.
参考资料：http://dictionary.reference.com/browse/luckiest%20