Ex-girlfriend

/ˈɛksɡˈɜːlfɹɛnd/

/ˈɛkzˈɡɝɫˌfɹɛnd/

Ex-girlfriend

a woman who was previously in a romantic relationship with someone but is no longer together with them

Examples

1. He introduced his new girlfriend to his ex-girlfriend at a social event, and they all got along surprisingly well.

2. After their breakup, he and his ex-girlfriend decided to remain friends and stay in touch.

3. I ran into my ex-girlfriend at the grocery store, and it was a bit awkward seeing her after so long.

4. You definitely struck a sour note when you brought up Dan's ex-girlfriends during your best man speech.