noun Billiards, Pool.
the ball a player strikes with the cue, as distinguished from the other balls on the table.
Origin of cue ball
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
billiards snooker the ball struck by the cue, as distinguished from the object balls
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012