(1)上诉人
广义上也包括请求签发纠错令〔writ of error〕的人。

(2)(重罪私诉中的)自诉方〔complaining party〕

• clerks of the general sessions of the peace
• Clerks of the Privy Seal
• on a lay
• on all fours
• onanism
• on a passage
• on arrival
• O.N.B.
• on board
• onboard bill (of lading)
• on call
• on call note
• Once a highway, always a highway.
• Once a mortgage, always a mortgage.
• Once an Englishman always an Englishman.
• once a week for four successive weeks
• once in jeopardy
• on commission
• on condition
• oncunne
• on default
• on demand
• on demand after date
• on duty
• one bite rule