about Look up about at Dictionary.com
O.E. onbutan "on the outside of," from on "on" + be "by" + utan "outside," from ut (see out). By 13c. it had forced out O.E. ymbe for meaning "in the neighborhood of." Abouts, with adverbial genitive, still found in hereabouts, etc., is probably a northern dialectal form. About face as a military command (short for right about face) is first attested 1861, Amer.Eng.