1. People with whom one has only a shallow or casual relationship, lacking depth or genuine familiarity
He had many superficial acquaintances at work but few close friends.
Ele tinha muitos conhecidos superficiais no trabalho, mas poucos amigos próximos.
2. Relationships characterized by minimal personal connection or engagement beyond polite interaction
Social media has increased the number of superficial acquaintances in our lives.
As redes sociais aumentaram o número de conhecidos superficiais em nossas vidas.