| Acronym | Definition |
|---|
| RB | Running Back (football) |
| RB | Replaced By |
| RB | Rubidium |
| RB | Rock Band (video game) |
| RB | Review Board |
| RB | Right Back (soccer position) |
| RB | Rose Bowl (college football game) |
| RB | Really Bad |
| RB | Red Bluff (California) |
| RB | Red Bull (energy beverage) |
| RB | Retinoblastoma Protein |
| RB | Radio Button |
| RB | REALBasic (REAL Software Inc.) |
| RB | Robert Bosch GmbH (auto industry supplier) |
| RB | Roll Back |
| RB | Rehoboth Beach (Delaware) |
| RB | Rock Bottom |
| RB | Regionalbahn (German: local train) |
| RB | Rubber Band |
| RB | Redondo Beach (California) |
| RB | Rechtbank (Courthouse) - Belgium |
| RB | Radio Bremen (German Radio and TV Station) |
| RB | Read Back (logging abbreviation) |
| RB | Recycle Bin |
| RB | Roast Beef |
| RB | Rainbow Bridge |
| RB | Root Beer |
| RB | Rx Bandits (band) |
| RB | Rio Bravo |
| RB | Syrian Arab Airlines (IATA airline code) |
| RB | Rainbow Brite (80's cartoon) |
| RB | Raging Bull (amusement park ride) |
| RB | Right Bumper (Xbox 360 controller button) |
| RB | Radio Broadcasting |
| RB | Red Border |
| RB | Regional Business |
| RB | Republic of Bulgaria |
| RB | Relative Bearing |
| RB | Rescue Boat |
| RB | Regular Budget |
| RB | Rose Bengal |
| RB | Reticulate Body (Chlamydia) |
| RB | Retirement Benefit(s) |
| RB | Round Ball (muzzleloader shooting) |
| RB | Radio Band |
| Rb | Base Resistance (transistors) |
| RB | Republic of Bashkortostan (region in Russian Federation) |
| RB | Radar Beacon (aircraft navigation aid) |
| RB | Robot Battle (game) |
| RB | Reactor Building |
| RB | Righteous Babe |
| RB | Resolution Bandwidth |
| RB | Reconnaissance Bomber |
| RB | Rankin-Bass (animation company) |
| RB | Realbot (Counter-Strike program) |
| RB | Repetition Blindness |
| RB | Recovery Block |
| RB | Responsible Body |
| RB | Request for Bid |
| RB | Ratebeer.com (website) |
| RB | Richard Blackwood (MTV UK and Ireland presenter) |
| RB | Reachback |
| RB | Myredbook.com (social network website) |
| RB | Recommended Buy (DoD DLA) |
| RB | Rauland-Borg Corporation (Skokie, Illinois) |
| RB | RockBoard (video game) |
| RB | Rice Bug |
| RB | Run Balanced (Front Page Sports Football '95 et al) |
| RB | Resistance Brazing |
| RB | Registerbank (assembly language ASM51 assembler control) |
| RB | Reentry Body |
| RB | Right Bench (stream/river) |
| RB | Race Breed (automotive) |
| RB | Ribbon Bridge |
| RB | Resurrection Blvd (TV show) |
| RB | Relocatable Buildings |
| RB | Rotary Beacon |
| RB | Radio Bearing |
| RB | Relay Broadcast |
| RB | Rinse Blank (water run over equipment that is analyzed to check for cross contamination) |
| RB | Reclamation Board |
| RB | Raffel Brothers (founders of Arby's) |
| RB | Ringwood Brewery (UK) |
| RB | Radiation Belt Mapper (Mission) |
| RB | Repasz Band (Williamsport, PA) |
| RB | Residue Beamwidth |
| RB | Ringgold Band (Reading, PA) |
| RB | Restbreak |
| RB | US Revenue Proprietary (Scott Catalogue prefix; philately) |
| RB | Radiator Bending |
| RB | Rohrersville Band (Rohrersville, MD) |
| RB | Reached Bottom Time (diving) |