“What does it mean that the church is the bride of Christ?”
Answer: The imagery and symbolism of marriage is applied to Christ and the body of believers known as the church. The church is comprised of those who have trusted in Jesus Christ as their personal Savior and have received eternal life. Christ, the Bridegroom, has sacrificially and lovingly chosen the church to be His bride (Ephesians 5:25–27). Just as there was a betrothal period in biblical times during which the bride and groom were separated until the wedding, so is the bride of Christ separate from her Bridegroom during the church age. Her responsibility during the betrothal period is to be faithful to Him (2 Corinthians 11:2; Ephesians 5:24). At the rapture, the church will be united with the Bridegroom and the official “wedding ceremony” will take place and, with it, the eternal union of Christ and His bride will be actualized (Revelation 19:7–9; 21:1-2).
Credits: Got questions.com