When someone visits you, or is present at the same place as you, you can say that they "come around". It kind of has the intonation that it is a regular thing that the person does. For instance, if you regularly go to a restaurant or bar and you frequently see a person named Robert there, but you haven't seen Robert in that place recently, you might say "Where is Robert? He doesn't come around anymore".

Well, like many phrasal verbs, you need a specific context. "To come around (to) [place]" means to casually visit. Come around here, come around to my place. Remember the rule for "come here"/"go there". Yes, you can use "go around" in this context if the journey is to somewhere else. "To come around" (no object) means to eventually agree, if there is a decision to be made. If a person is unconscious, then "come around" means to regain consciousness. It can also mean the arrival of a date or season (when winter comes around, when your birthday comes around), or moving around a physical object (come around the corner, come around the back of the shed, she'll be coming round the mountain...). It really depends on the context! This is the beauty of phrasal verbs, and the reason native speakers use them so often.

Definition: "To agree to do something eventually, after a long wait." Example: "Finally, she came around to painting the kitchen." Another example: "She hesitated for a long time, but eventually we got Lynn to come around." This is a famous English Idiom, and I've heard/used it many times. I found this at: [http://idioms.thefreedictionary.com/come+around] I hope this helped, and if it didn't then just let me know. I have a few more examples if needed. -Kyle