round about—
1. approximately; around:
- When I had my boy in day care, it used to cost me round about fifty dollars.
2. in the neighborhood:
- We would go off to collect mushrooms, there were plenty in the fields round about.
roundabout—
1. (UK) merry-go-round (a revolving structure for children to ride on):
- The photo shows a group of children on a roundabout in the park.
2. a road junction consisting of a circular area around which traffic can flow continuously:
- Exit the airport, then turn left and drive to the roundabout.
3. (of an answer, etc.) not direct or straightforward:
- Ask him what he does for a living, and he’ll give you a roundabout answer.