Psalm 45:9 (b) This is one of the names applied to the church. She will one day be married to the Bridegroom and will stand at His right hand as His bride forever. She is called a queen because she is married to the King of kings.
Revelation 18:7 (b) This word describes the pride of Babylon (the great false religions of Christendom) in which she takes the place of being the bride of the King of kings, whereas in reality she is really a harlot, and is so named by our Lord.