What is the meaning of Sir?

A man of a higher rank or position.

A respectful term of address to a man of higher rank or position, particularly:

  1. to a knight or other low member of the peerage.

    to a knight or other low member of the peerage.

    to a superior military officer.

    to a teacher.

    A respectful term of address to an adult male (often older), especially if his name or proper title is unknown.

    To address another individual using "sir".

    appearance

    earth

    land, mountain

    Alternative form of sire

    cheese

    grass

    an honorific to a man senior than oneself, especially a teacher or a police officer

    Nonstandard form of (soe).

    travel through, traverse

    seek out, have recourse to

    seek, ask for

    beseech, implore

    sir

    seek, search, look for

    cheese

    cheese

    secret

    county, shire

    garlic

    Source: wiktionary.org