Vai or VAI has several possible meanings:
- Vaï, Moroccan-French Canadian rapper
- Vai people
- Vai language
- Vai syllabary
- Vai (Crete)
- Văi, a village in Lupşa Commune, Alba County, Romania
as an abbreviation:
- VAI, Video Artists International, a classical music record label
- Visual Art Institute
- Voest-Alpine Industrieanlagenbau, now part of Siemens VAI Metals Technologies
Vai also appears in names of persons:
- Rosita Vai, a New Zealand singer
- Steve Vai, guitarist
- Steve Vai's band Vai
- Vai Sikahema, an American football player
- Vai Taua, an American football player
- vai is also an English abbreviation for verb animate intransitive