either member of an unmarried, cohabiting, and especially homosexual couple that seeks benefits usually available only to spouses.
Is It Time For All Couples To Use The Term “Partner”?There are a lot of different words one could use to describe the person with whom they're in a romantic relationship. But, the one word that is most quickly redefining the way we talk about relationships is partner.
Origin of domestic partner
First recorded in 1975–80
Related formsdomestic partnership, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019