The definition of unfriend is to remove someone from your friend list on a social networking site like Facebook.
An example of unfriend is to stop following someone on your Facebook feed.
transitive verbun·friend·ed, un·friend·ing, un·friends
To remove (someone) as a friend on a social networking website.
- One who is not a friend; an enemy.
(third-person singular simple present unfriends, present participle unfriending, simple past and past participle unfriended)
- (rare) To sever as friends.
- (Internet) To defriend; to remove from one's friends list (eg on a social networking website).