ca·si·no (k?-s??n?)n. pl. ca·si·nos 1. A public room or building for gambling and other entertainment.2. also cas·si·no A card game for two to four players in which cards on the table are matched by cards in the hand.3. A summer or country house in Italy.[Italian country club, hunting lodge, casino, from diminutive of casa, house, from Latin, cottage, hut, humble dwelling.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.casino (k??si?n??) n, pl -nos1. (Gambling, except Cards) a public building or room in which gaming takes place, esp roulette and card games such as baccarat and chemin de fer2. (Card Games) a variant spelling of cassino[C18: from Italian, diminutive of casa house, from Latin]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014ca?si?no (k??si no?) n., pl. -nos. 1. a building or large room used for meetings, dancing, or esp. for professional gambling. 2. (in Italy) a small country house or lodge. 3. Also, cassino. a card game in which cards that are face up on the table are taken with eligible cards in the hand. [1780?90;