Definition of "round about"

round about

adverb
not comparable
1. In an opposite direction.
2. (emphatic) Round; around.
prepositional phrase
1. At a point or time approximately equal to.
  Quotations
  Nevertheless, the modern outside cylinder 2-6-0 may be said to have had its beginnings on the G.N.R. and G.W.R. round about 1911.
  1945 November and December, H. C. Casserley, “Random Reflections on British Locomotive Types—1”, in Railway Magazine, pages 318–319