βασιλεία
basileía · noun · “kingdom, reign”
Basileia is kingdom — and more precisely God’s kingly rule or reign. The “kingdom of God” is the central theme of Jesus’ preaching: God’s reign breaking into the world through him.
Basileia points less to a place than to a reign — the active rule of a king. When Jesus announces that “the kingdom of God is at hand,” he means God’s saving rule is arriving in his own person and work.
The kingdom is “already” present wherever Jesus is received as King, and “not yet” fully come until he returns. To “seek first the kingdom” is to make God’s reign the organizing center of life.
Definition: properly, royalty, i.e. (abstractly) rule, or (concretely) a realm (literally or figuratively)
KJV usage: kingdom, + reign
Reference gloss from Strong's Concordance (1890, public domain).
Original BibleDawn word study. Original-language data and the public-domain Strong's (1890) gloss are referenced; see sources.