rock and roll or rock’n’rolln1. (Pop Music) a. a type of pop music originating in the 1950s as a blend of rhythm and blues and country and western. It is generally based upon the twelve-bar blues, the first and third beats in each bar being heavily accentedb. (as modifier): the rock-and-roll era. 2. (Dancing) dancing performed to such music, with exaggerated body movements stressing the beatvb (Dancing) (intr) to perform this dance rock and roller, rock’n’roller nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014rock? and roll? or rock? & roll?, n., v. rock’n’roll. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.