jackstones jacks·to·nes uncommon noun 1. plaything consisting of small 6-pointed metal pieces that are used (along with a ball) to play the game of jacks Synonymsjacks 2. a game in which jackstones are thrown and picked up in various groups between bounces of a small rubber ball Synonymsjacksknucklebones Related words Broader terms child's gameplaything WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
