What is the meaning of κύριος?

main; major; primary; principal

ruling; governing; having power

decisive; critical; authorized; valid; legal; entitled

time being fixed; set; appointed

literal

lord; master; guardian; ruler; owner; teacher

sir

God; Yahweh; Jehovah

the Holy Spirit

mister (title conferred on an adult male)

master (someone who has control over something or someone)

sir (an address to any male)

main, principal, most important

Source: wiktionary.org