SIR

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Definitions

1. the term, Sir, is normally used when addressing an officer, as in, "Excuse me, Sir.' "Thank you, Sir." Or "Sir, May I have your permission . . ." It is also used when answering an officer's question or responding to an order. "Yes, Sir." "No, Sir." "Aye aye, Sir." Or "The report will be on your desk by 1800 hours, Sir.' (FO 38-I)

2. only officers are addressed as "Sir.' And they are so addressed whether male o female. (FO 87)