object balln.1. The ball in billiards or pool that a player hits or intends to hit first with the cue ball.2. Any ball in billiards or pool that can be targeted by the cue ball following the rules of a given game.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.object ball n (Billiards & Snooker) billiards snooker any ball except the cue ball, esp one which the striker aims to hit with the cue ball Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014ob?ject ball` n. 1. the first ball struck by the cue ball in making a carom in billiards or pool. 2. a ball to be struck by the cue ball; any ball except the cue ball. [1855?60] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.object ballBall aimed at.Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited