(typography) The usual form of the letter r (which is r), as contrasted with r rotunda (ꝛ).

(US, film) a movie that is definitely, or most likely will be, R-rated ("Under 17 requires accompanying parent or adult guardian.") by the Motion Picture Association (MPA), typically due to having multiple scenes of violence or nudity.

(logistics, supply chain management, retail) Initialism of forecasting and replenishment.

Initialism of rhythm and grime.

Alternative form of CCR

(education) The letter r (in certain English words, such as bird and sort) that modifies the pronunciation of the preceding vowel.

(Internet slang) A habitual poster on the /r9k/ - ROBOT9001 board on 4chan; a member of the /r9k/ community.

plural of R-word

Alternative letter-case form of r-word

Dated spelling of R & B.