| Acronym | Definition |
|---|
| PJ | Pajama(s) |
| PJ | Para-Jumper/Pararescueman |
| PJ | Petaling Jaya (Selangor, Malaysia) |
| PJ | Polly Jean Harvey (singer) |
| PJ | Pearl Jam (band) |
| PJ | Partido Justicialista (Argentina) |
| PJ | Peter Jackson (Lord of the Rings director) |
| PJ | Peach John (Japan) |
| PJ | Private Jet |
| PJ | Papa John's (Pizza) |
| PJ | Pineapple Juice |
| PJ | Pastoral Juvenil (Spanish: Youth Ministry) |
| PJ | Port Jervis (New York, USA) |
| PJ | Police Jurisdiction |
| PJ | Personal Jesus |
| PJ | Perpetuum Jazzile (Slovenian choir) |
| PJ | Personal Jurisdiction (Law) |
| PJ | Princeton Junction (train station) |
| PJ | Police Judiciaire (France) |
| PJ | Polícia Judiciária (Portugal) |
| PJ | Pomegranate Juice |
| PJ | Plain Jane |
| PJ | Pararescue Jumper |
| PJ | Pigeon John (singer) |
| PJ | Pear Juice |
| PJ | Periodic Jitter |
| PJ | Practical Joke |
| PJ | Presiding Judge (courts) |
| PJ | Purple Jesus (drink) |
| PJ | Photo-Journalist (USAF) |
| PJ | Personal Joke (Internet slang) |
| PJ | Picojoule |
| PJ | Puddle Jumper |
| PJ | Pièce Jointe (French :Email attachment) |
| PJ | Project Justice (video game) |
| PJ | Peta-Joule (10^15 Joules) |
| PJ | Pump Jack (oilfield equipment) |
| PJ | Passive Jamming |
| PJ | Party Juice (alcoholic beverage) |
| PJ | Process Job (SEMI Carrier Management term) |
| PJ | Poor Joke |
| PJ | Purchase Journal |
| PJ | Paintball Junkies |
| PJ | Prunus Japonica |
| PJ | Precessing Jet (nozzle) |
| PJ | Provincia Jujuy (Argentina province, airline code) |
| PJ | Pulse Jitter |
| PJ | Procurement Justification |
| PJ | Pile Jump (gaming) |