What is the meaning of Gentleman?

A man of gentle but not noble birth, particularly a man of means (originally ownership of property) who does not work for a living but has no official status in a peerage; an armiferous man ranking below a knight.

Any well-bred, well-mannered, or charming man.

An effeminate or oversophisticated man.

Any man.

An amateur or dabbler in any field, particularly those of independent means.

An amateur player, particularly one whose wealth permits him to forego payment.

gentlemanlike

A respectful term for a person of either sex: gentleman, lady

gentleman

gentleman, especially an anglophone one

gentleman

British gentleman

a gentleman (refined, well-mannered man)

Source: wiktionary.org