1. a small six-pointed metal piece used in the game of jacks
Usage: usually used in plural form 'jacks'
2. the game played by tossing and catching small metal pieces and a ball
Usage: often called simply 'jacks'

Examples

• She picked up a jackstone from the floor after the game ended.
• The children played jacks using metal jackstones and a rubber ball.
• Each jackstone has six points that make it easy to grab quickly.
• He lost one jackstone and had to search under the couch.
• The game requires skill to toss the ball and collect the jackstones in order.