κλεῖς

a key

Definition

The Greek word κλεῖς refers to a key, a physical object used to lock or unlock doors. In the New Testament, it is used both literally and metaphorically. In its literal sense, it denotes a physical key, as in Revelation 9:1 where an angel holds the 'key to the shaft of the Abyss.' Metaphorically, it symbolizes authority, power, and the right to grant or deny access. This is most prominent in Matthew 16:19, where Jesus gives Peter the 'keys of the kingdom of heaven,' representing the authority to bind and loose, and in Revelation 1:18 and 3:7, where Jesus holds the 'keys of Death and Hades' and the 'key of David,' signifying His supreme authority over death and the messianic kingdom.

Biblical Usage

The word is used six times in the New Testament, primarily in the Gospels of Matthew and Luke and the book of Revelation. In Matthew 16:19 and Luke 11:52, it is used metaphorically for spiritual authority and knowledge. In Revelation, it appears four times (1:18; 3:7; 9:1; 20:1), consistently symbolizing divine authority—over death, the messianic lineage, the abyss, and the abyss again—granted to Christ or His angels. The usage shifts from a metaphor for teaching authority in the Gospels to a symbol of cosmic, eschatological authority in Revelation.

Etymology

Derived from the Greek verb κλείω (kleiō, G2808), meaning 'to shut' or 'to close.' The noun κλεῖς literally means 'that which closes,' i.e., a key. This root connection emphasizes the function of locking and unlocking. Cognates appear in other Indo-European languages, and the basic meaning remained consistent in ancient Greek.

Semantic Range

This word is theologically significant as a powerful metaphor for authority and access. The 'keys of the kingdom' (Matthew 16:19) relate to the authority of the church in proclamation and discipline. Jesus holding the 'keys of Death and Hades' (Revelation 1:18) is a central declaration of His victory over death and His sovereignty in salvation and judgment. The 'key of David' (Revelation 3:7) connects Jesus to the messianic lineage and His control over access to God's promises. Understanding this metaphor enriches the reading of these passages by highlighting themes of divine permission, judgment, and salvation.

In the ancient world, keys were often large, cumbersome objects made of wood or metal, symbolizing significant responsibility and control. Possessing a key meant having authority over a household, city gate, or treasury. The metaphorical use would immediately convey ideas of stewardship, exclusive access, and power to a first-century audience, much more so than with a modern small key. The 'key of David' allusion (Isaiah 22:22) specifically references the authority of the royal steward over the Davidic palace.

κλείς (kleis, G2807) — The standard word for a key. No direct synonyms with distinct meanings are used in the NT for this concept. The related verb κλείω (kleiō, G2808) — meaning 'to shut' or 'close,' is the root action.

Word Details

Scripture References