1. To make more or less familiar, to make aware, or to make conversant; to cause to come to know personally (usually followed by with): "We wanted to acquaint the mayor with our plan."
2. To furnish with knowledge; to inform (usually followed by with): "We tried to acquaint the manager with our findings."
3. To bring into social contact; to introduce; to make familiar (usually followed by with): She acquainted her roommate with my cousin.