air line arrest beeline bell border line bound boundary boundary condition boundary line bourn break boundary breakoff point ceiling check checkmate circumscription compass confine cut cutoff point dead stop deadline deadlock delimitation determinant division line end endgame ending extremity final whistle finish floor frontier full stop grinding halt gun halt hedge high-water mark interface limen limit limitation limiting factor line line of demarcation lockout low-water mark lower limit march mark mete shortcut shortest way sit-down strike stalemate stand standoff standstill start starting line starting point stay stop stoppage strike target date term terminal date terminus threshold time allotment upper limit walkout work stoppage