(1)(罗马法)界限
指竞赛场的边界，如跑道终点处或比赛马车打转处的标记，也可延指对时、空的限制。

(2)(古)界标；地标
指土地的边界线，或用作地界的物体。

• usurious rate
• usurp
• usurpatio
• usurpation
• usurpation of franchise
• usurper
• usury
• usury laws
• usus
• usus bellici
• Usus est dominium fiduciarium.
• Usus Feudorum
• usus fori
• usus fructus
• utas
• uterine
• uterine brother or sister
• utero(-)gestation
• uterque
• utfangenethef
• utfangthef
• utfangtheft
• uti
• uti frui
• Utile per inutile non vitiatur.