A lottery, typically with an accumulating jackpot, in which participants play numbers of their choice in a random drawing.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "lotto" in a sentence
"The New York Times considers whether playing the lotto is “irrational.”"
"I made a block for the Block Lotto on quilting. about.com - and I almost showed a photo here - forgot that it was still sneak peek time for the November lotto - so I will show it in a few days, when it's November, and the lotto is officially opened."
"A block lotto is when you make a number of blocks (usually limited to 5 or 6) and send them in to a central hostess - at the end of the month, she draws lots for the blocks, based on how many blocks you sent in."