Wiktionary
vb. 1 (context idiomatic English) to stay, linger or loiter 2 (context idiomatic English) to spend time or be friends (especially '''to hang around with''' someone)
WordNet
v. be about; "The high school students like to loiter in the Central Square"; "Who is this man that is hanging around the department?" [syn: loiter, lounge, footle, lollygag, loaf, lallygag, mess about, tarry, linger, lurk, mill about, mill around]
Usage examples of "hang around".
When the Covin had given up, he had decided to hang around for a few days to make sure that was not just a trick.
And if you use your imagination a bit, you can understand that, if you hang around long enough, you'll become fossilized there too, and in time some more advanced organism will become fossilized on top of you.
If you love him, you don't- love me, and yet you've let me hang around all these months, knowing I am mad about you.
Hodson (who'd fagged me at Rugby) and Macdonald the Peeler and Sam Browne and little Fred Roberts, who wasn't much more than a griff,41 but knew enough to hang around us older hands, warming himself in the glow of our fame.