【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.