(oikos pneumatikos, "house spiritual"): A body of Christians (a church), as pervaded by the Spirit and power of God (1Pe 2:5); a term applicable to God's house: "house of prayer," the temple (Mt 21:13); to heaven: "my Father's house" (Joh 14:2); to the tabernacle: "Moses .... faithful in all his house" (Heb 3:2); to saints: as "the household of God" (Eph 2:19), and "the temple of the Holy Spirit" (1Co 6:19); hence, any "habitation of God in the spirit" (Eph 2:22) in which His glory dwells and His power and grace are manifest.
The International Standard Bible Encyclopedia
Spiritual House
The International Standard Bible Encyclopedia, James Orr (1915). Public domain, from the CrossWire SWORD module.