significant other

noun

1. Sociology. a person, as a parent or peer, who has great influence on one's behavior and self-esteem.
2. a spouse or cohabiting lover. : SO, S.O.

significant other

noun

1. informal.
   a spouse or lover

Example Sentences

They also discussed it being “freeing” when they finally rid themselves of their cheating significant others.

From Los Angeles Times

I will never not stop to watch a video of someone filming their friend or significant other reaching the George O’Malley episode for the first time.

From Los Angeles Times

You’re probably freezing while reading this, bundled up in multiple layers, desperately clinging to your significant other, and running your oven with the door open just to feel something.

From Los Angeles Times

When they go home for Thanksgiving, they make a pact that they're both going to dump their significant others, and chaos ensues because it's a movie.

From Salon

One day, Jamie and Ben resolve to dump their significant others over Thanksgiving break — specifically, on the night before the holiday.

From Los Angeles Times