1. Approximately; nearly: The interview lasted about an hour.
2. Almost: The job is about done.
3. To a reversed position or direction: Turn about and walk away slowly.
4. In no particular direction: wandering about with no place to go.
5. All around; on every side: Let’s look about for help.
6. In the area or vicinity; near: spoke to a few spectators standing about.
7. In succession; one after another: Turn about is fair play.
(Courtesy of answers.com)