D defs.my
Entry 1 sense Webster, 1913

Luck

/lŭk/ · IPA /lʌk/
01 n. That which happens to a person; an event, good or ill, affecting one's interests or happiness, and which is deemed casual; a course or seri…
  1. 1.
    That which happens to a person; an event, good or ill, affecting one's interests or happiness, and which is deemed casual; a course or series of such events regarded as occurring by chance; chance; hap; fate; fortune; often, one's habitual or characteristic fortune; as, good, bad, ill, or hard luck. Luck is often used by itself to mean good luck; as, luck is better than skill; a stroke of luck.
    “If thou dost play with him at any game, Thou art sure to lose; and of that natural luck, He beats thee 'gainst the odds.” Shak.
Phrases & compounds
Luck penny — a small sum given back for luck to one who pays money.
To be in luck — to receive some good, or to meet with some success, in an unexpected manner, or as the result of circumstances beyond one's control; to be fortunate.