What does "ex-friend" mean?

One who is no longer a friend; a former friend.

What is a synonym for "ex-friend"?

Common synonyms include: unfriend.

noun

noun ·Rare ·Advanced level

Noun

1
One who is no longer a friend; a former friend.
"Melody tried to imagine her exfriend snooping through her phone."

"Melody tried to imagine her exfriend snooping through her phone."

From ex- + friend.