(with the verb "to be") Present in the vicinity.

“Is Clare around today?”

(with the verb "to be") Alive; existing.

“"How is old Bob? I heard that his health is failing."  "Oh, he's still around. He's feeling better now."”

So as to form a circle or trace a circular path, or approximation thereof.

“High above, vultures circled around.”

So as to surround or be near.

“Everybody please gather around.”

Nearly; approximately; about.

“An adult elephant weighs around five tons.”

Defining a circle or closed curve containing a thing.

“I planted a row of lilies around the statue.”

(of abstract things) Centred upon; surrounding.

“There has been a lot of controversy around the handling of personal information.”

Following the perimeter of a specified area and returning to the starting point.

“She went around the track fifty times.”