acquainted with (someone/something)

1. Having met someone, but not knowing them well. I'm just acquainted with Daniel because we have many friends in common. Are you acquainted with my sister? I can't remember if you two met before.

2. Knowledgeable about or familiar with something. I need to become acquainted with the rules of this game. Dale is acquainted with the new procedure for data entry, so he will show it to you.