1. 1〔庭の石〕a garden stone
  1. 2〔碁のハンディ〕a handicap stone (in go)
    • 彼には6個の置き石をしても勝てない
    • Even with a six-stone handicap, I can't beat him.
  1. 3〔線路上の〕a stone put on a railroad track