intermarriage

[ in-ter-mar-ij, in-ter-mar-ij ]
/ ˌɪn tərˈmær ɪdʒ, ˈɪn tərˌmær ɪdʒ /

noun

marriage between people of different religions, tribes, castes, ethnicities, or racial groups, as between a white person and a black person or between a Christian and a Muslim.
marriage between people of different social classes.
marriage within a specific social or cultural group, as required by custom or law; endogamy.
marriage between people belonging to the same small group, especially if they are close blood relatives.

Origin of intermarriage

First recorded in 1570–80; inter- + marriage
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for intermarriage