life partner

American  

noun

1. one member of a monogamous relationship.

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life partner British  

noun

1. either member of a couple in a long-term relationship

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Example Sentences

Mark Nash, a British curator who is Julien’s life partner and who has collaborated on his films since they met in the 1980s, recalled the period as an “exciting cultural moment” — both in Britain and abroad.

From New York Times

And it’s definitely concerning when someone asking to be your life partner shows zero interest in what you actually want.

From Washington Post

The faces of the sphinxes are all portraits of members of her family: her mother, Glenda, her cousin Aujane, her brother Dominic, her life partner, Monique McWilliams.

From New York Times

But in 1999, Ortega-Medina and his life partner moved to Canada in search of greater freedom, and in 2005 they were among the first same-sex couples in the Western Hemisphere to marry.

From Los Angeles Times

Settling in Caracas, she worked for an architectural firm, married, had two children, became a Venezuelan citizen, divorced, and met her life partner, the graphic designer Gerd Leufert.

From New York Times