Roller Derby(redirected from roller derbies)
(Individual Sports, other than specified) a race on roller skates, esp one involving aggressive tactics
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a contest between two teams on roller skates, held on a circular track, in which the players try to free a teammate for the opportunity to score by lapping one or more opponents.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.