Adjective lucky has 3 senses
  1. lucky - blessed with good fortune; "considered himself lucky that the tornado missed his house"; "a lucky guess"
    unfortunate (indirect, via fortunate)
  2. lucky - having or bringing good fortune; "my lucky day"
    unlucky, luckless, hexed, jinxed
  3. auspicious, encouraging, favorable, favourable, lucky, prosperous - tending to favor or bring good luck; "miracles are auspicious accidents"; "encouraging omens"; "a favorable time to ask for a raise"; "lucky stars"; "a prosperous moment to make a decision"
    Antonym: unpropitious (indirect, via propitious)