SPIRITUAL HOUSE

(oikos pneumatikos, "house spiritual"): A body of Christians (a church), as pervaded by the Spirit and power of God (1 Peter 2:5); a term applicable to God's house: "house of prayer," the temple (Matthew 21:13); to heaven: "my Father's house" (John 14:2); to the tabernacle: "Moses .... faithful in all his house" (Hebrews 3:2); to saints: as "the household of God" (Ephesians 2:19), and "the temple of the Holy Spirit" (1 Corinthians 6:19); hence, any "habitation of God in the spirit" (Ephesians 2:22) in which His glory dwells and His power and grace are manifest.

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co.