What is the meaning of Senhor?

A Portuguese gentleman.

Obsolete spelling of señor.

lord, lady

Lord, Lady

lord (a nobleman in medieval society)

a man (an adult male human)

gentleman (a respectable man)

an old man

sir, mister (a respectful term of address to a man)

sir (address to any male, especially if his name or proper address is unknown)

sir (address to a military superior)

feudal lord

master (owner of a slave)

Sir (title given to a knight)

great; big; fine; remarkable (used to highlight or intensify the quality, size or value of things)

Source: wiktionary.org