(1)亲笔(书写)；笔迹；笔法；手写

(2)亲笔书写的文件；(某人的)签名

• onus episcopale
• onus of proof
• onus probandi
• oops
• oos
• OPEC
• ope consilii
• ope consilio
• ope et consilio
• open a case
• open account
• open a commission
• open a court
• open and notorious
• open and notorious adultery
• open and notorious possession
• open and visible easement
• open bid
• open cheque
• open contract
• open corporation
• open court
• open cover
• open credit
• open danger