See also: rr, RR, R&R, and R.R. English Proper noun R-R Initialism of Rolls-Royce. Noun R-R (plural R-Rs) Initialism of Rolls-Royce. Alternative forms (Rolls-Royce): RR, R.R., R. R., R.-R.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads