What does the interracial mean?

: of, involving, or designed for members of different races (see race entry 1 sense 1a)

What does the term interracial couple mean?

Interracial marriage is a form of marriage involving spouses who belong to different races or racialized ethnicities. In the past, such marriages were outlawed in the United States, Nazi Germany and apartheid-era South Africa as miscegenation.