What is the meaning of κύριος?

ruling, governing, having power (describing a person)

things being decisive, critical, authorized, valid, legal, entitled

time being fixed, set, appointed

language being literal

main, major, primary, principal

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