Definition of "backfriend" in English

noun

1. (archaic) A friend who supports someone; a person who has someone's back; a backer, a supporter.

2. Synonym of hangnail (“a loose, narrow strip of nail tissue protruding from the side edge and anchored near the base of a fingernail or toenail”).

3. (obsolete) A person who pretends to be someone's friend; a false friend, a secret enemy.