Adi may refer to:
Peoples and places:
- Banu Adi, a clan of the Quraish tribe of Mecca
- Adi people, a tribe living in Arunachal Pradesh, India
- Adi language, the Tibeto-Burman language spoken by the Adi
- Adi, Israel, a communal settlement in northern Israel
- Adi Island, an island in West Papua, Indonesia
- Adi (mountain), a mountain near Saint-Étienne-de-Baïgorry, France
- Adi (metaphysical plane), a Hindu cosmological term about reality about the first cause
- Adi (Khanapur), Belgaum District, Karnataka
- Adi (Chikodi), Belgaum District, Karnataka
Names and titles:
- Adi (title), a Fijian title used by females of chiefly rank
- Adi (name), a given name or nickname in various languages
- in Hebrew: a name meaning 'jewel' or 'adornment'
- an Indian word meaning first, as in:
- Adi Granth, the Holy Scripture of Sikhism
- Adi Shankara, an Indian philosopher
- Adikavi Pampa, the first poet of Kannada
People with name Adi:
- Adi Bichman, Israeli swimmer
- Sheikh Adi ibn Musafir, Kurdish sufist
- Adi Bitar, Palestinian judge
- Adi Dassler, German founder of Adidas
- Adi Granov, Bosnian comic artist
- Adi Nes, Israeli photographer
- Adi Ophir, Israeli philosopher
- Adi Shamir, Israeli cryptographer
- Adi Shankara, Indian mystic
- Adi Smolar, Slovenian singer/songwriter
ADI, a three-letter abbreviation:
- ADI 4277 and ADPF 132 v. Brazilian civil union, are Actions to Civil union equality
- Acceptable daily intake, in health and medicine
- Advanced Distance Integration, a Konica Minolta camera term for flash metering
- Aerobic dependence index
- Aerodynamics Inc. ADI, an aviation service provider
- Acting Detective Inspector
- After Date of Invoice
- Africa Development Indicators, a compilation of data assembled by the World Bank
- Aircraft de-icer and inhibitor
- Aircraft Designs Inc., an aircraft design firm in Monterey, California
- Alternating direction implicit method for solving partial differential equations
- American Documentation Institute, now abbreviated as ASIS&T
- ADInstruments, ADI is historical usage. ADInstruments is now preferred
- Ángeles del Infierno, a Spanish heavy metal band
- Anti-detonant injection for internal combustion engines
- Analog Devices Incorporated, producer of semiconductors (ADI is their symbol on the New York Stock Exchange)
- Animal Defenders International, a nonprofit campaigning group
- Application and Data Integration, in computing
- Approved Driving Instructor, a qualified UK car driver trainer
- Area of dominant influence, in broadcast marketing, an Arbitron
- Associazione per il Disegno Industriale
- Atlantodental interspace, AKA atlantodental interval, a radiological measurement of cervical stability
- Attitude Director Indicator, aircraft flight instrument
- Austempered Ductile Iron, a heat treated high-strength form of ductile iron
- Australian Defence Industries
- Australian Doctors International
- Authorised Deposit-Taking Institution, a corporation authorised under the Australian Commonwealth Banking Act 1959
- Autism Diagnostic Interview, a semistructured parent interview used to aid in diagnosing autism
- Asset Distribution Interface, a specification from CableLabs
- The code for Ahmedabad Railway Station, Ahmedabad, India