Definition of "by luck" []

• By accident (adverb)

WordNet. Princeton University. 2010.

• "... was the first human being who had stirred anything in him in years, and he had no inclination to see her go back down a road she had survived as much by luck as cleverness—this time armed with a fatal over-confidence."
• "Since we met, as he said, by luck and weather, he put on the lightness of men at the hunt or at the Games: told battle-tales and jokes, admired my horses."
• "Wally, who was almost always tongue-tied and shy with other people — especially girls — had partly by luck and partly out of a sense of self-preservation begun his conversation with Myrtle Jimson on the one topic that would permit him to be fluent, even eloquent: computers."