How is “about your person” used?

In Barry Lyndon (1975), one line is: “I have hidden my neck ribbon somewhere on my person.”

Which movie is “about your person” from?

The clip at the top of this page is from Barry Lyndon (1975).

I have hidden my neck ribbon somewhere on my person.

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if you have or carry sth about / on your person, you carry it about with you, for example in your pocket

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if you have or carry sth about / on your person, you carry it about with you, for example in your pocket
Well, unless someone brings an attach case to dinner, they won't have an envelope that size on their person.

定義：Oxford Advanced Learner's Dictionary 第 9 版