significant other
Plural
significant others
1
one's partner, wife, or husband with whom one has a long-term sexual or romantic relationship
- She introduced her significant other to her family at the holiday gathering.
- They've been together for years, and he's her significant other in every sense of the term.
- He surprised his significant other with a weekend getaway to celebrate their anniversary.
- The company's holiday party invites employees to bring their significant others to join in the festivities.
- She relied on her significant other for emotional support during a challenging time in her career.