What is Lucky ?
Lucky is (adj) 1. having good things happening to you He’s lucky not to have been sent to prison. How lucky you are to be going to Spain! you’ll be lucky! it will never happen (informal.) She’s hoping to get an extra day off this week – she’ll be lucky! 2. which brings luck 15 is my lucky number. (NOTE: luckier – luckiest)
source: Easier English, Student Dictionary Upper Intermediate Level