* To make someone know or understand something well: This is the most common meaning. For example, you might "familiarize yourself with the company's policies" before starting a new job.
* To make something seem more comfortable or less strange: You might "familiarize yourself with a new city" by exploring its neighborhoods.
* To bring something into common use: You might "familiarize the public with a new product" by advertising it heavily.
Essentially, "familiarize" involves reducing unfamiliarity by increasing knowledge, understanding, or exposure. It often implies a process of learning or becoming acquainted with something new.