Definition of "riffle" [rif•fle]

• A rocky shoal or sandbar lying just below the surface of a waterway. (noun)
• A stretch of choppy water caused by such a shoal or sandbar; a rapid. (noun)
• In mining, the sectional stone or wood bottom lining of a sluice, arranged for trapping mineral particles, as of gold. (noun)
• A groove or block in such a lining. (noun)
• Games The act or an instance of shuffling cards. (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.

• "The standard way to mix a deck of playing cards—the one used everywhere from casinos to rec rooms—is what is known as a riffle or "dovetail" shuffle."
• "And he would smile and say, “Your riffle is imperfect.”"
• "I will stick to the 12 gauge and bolt riffle, that is my comfort zone."