From Longman Dictionary of Contemporary Englishlottolot‧to /ˈlɒtəʊ $ ˈlɑːtoʊ/ noun [countable] a game used to make money, in which people buy tickets with a series of numbers on them. If their number is picked by chance, they win money or a prize.
Examples from the Corpus
lotto• The state lottery, approved by voters 11 years ago, offers lotto and scratch-off tickets as close as the corner market.Lotto, thethe LottoLotto, the trademark the main gambling (gamble) game that part of the UK National Lottery 