The meaning of Wife in the Bible
(From Easton's Bible Dictionary)

The ordinance of marriage was sanctioned in Paradise (Genesis 2:24; Matthew 19:4-6). Monogamy was the original law under which man lived, but polygamy early commenced (Genesis 4:19), and continued to prevail all down through Jewish history. The law of Moses regulated but did not prohibit polygamy. A man might have a plurality of wives, but a wife could have only one husband. A wife's legal rights (Exodus 21:10) and her duties (Proverbs 31:10-31; I Timothy 5:14) are specified. She could be divorced in special cases (Deuteronomy 22:13-21), but could not divorce her husband. Divorce was restricted by our Lord to the single case of adultery (Matthew 19:3-9). The duties of husbands and wives in their relations to each other are distinctly set forth in the New Testament (I Corinthians 7:2-5; Ephesians 5:22-33; Colossians 3:18,19; I Peter 3:1-7).

See more on the meaning of Wife in the Bible:
Wife {International Standard Bible Encyclopedia}

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