What is the meaning of Señor?

A Spanish term of address equivalent to sir or Mr., used alone or capitalized and prefixed to the name of a married or an older man.

elder, senior

sir, mister

lord, master, liege

the Lord / God

lady, milady

señor (a Spanish term of address equivalent to sir or Mr.)

mister, sir, lord (title conferred on a married or older male)

gentleman

master

great big; whopping

free

alternative spelling of senyor

Source: wiktionary.org