To enter a place, vehicle, or enclosed space. She managed to get in the car before it started raining.
To arrive at a destination. We should get in around 7 PM if the traffic isn't too bad.
To be accepted or admitted to a group, organization, or institution. He was thrilled to get in to his first-choice university.
To succeed in making contact with someone. I tried calling her all day, but I couldn't get in touch.