significant other (noun)

1. The modern and sleek design of the house includes a separate wing for the significant other, providing them with their own private space.

2. In the distant future, humans have developed sophisticated AI robots to serve as significant others, capable of fulfilling all emotional and physical needs.

3. The fashion show showcased a collection of extravagant outfits designed for extravagant significant others, featuring bold colors and luxurious fabrics.

4. On their anniversary, he surprised her with a romantic dinner date, complete with candlelit ambiance and her favorite food, showing how much he cherishes his significant other.