- ADJ stands for Adjective
- ADJ stands for Adjustable
- ADJ stands for American DJ (brand name)
- ADJ stands for Adjacent
- ADJ stands for Adjunct
- ADJ stands for Adjoint (of a matrix or an operator; math)
- ADJ stands for Adjutant
- ADJ stands for Administration of Justice (criminal justice course; various universities)
- ADJ stands for Adjourned
- ADJ stands for Additional District Judge (India)
- ADJ stands for Adjudged
- ADJ stands for Adjust/Adjustment
- ADJ stands for Australian Dental Journal
- ADJ stands for Amman, Jordan – Civil (Airport Code)
- ADJ stands for Another Dead Junkie
- ADJ stands for Action pour le Développement des Jeunes (French: Action for the Development of Youth; Togo)
- ADJ stands for Australian Designer Jewellery (Sydney, Australia)
ADJ