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VAV as a three-letter abbreviation may refer to

  • A variable air volume device, used in HVAC systems to control the flow of air
  • Vis-à-vis, a French expression, used as an alternative to "re" and meaning "in relation to".

Vav as a word may refer to

  • Vav (letter), a Semitic letter
  • Vav (protein)s, a family of guanine nucleotide exchange factors involved in cell signalling
  • Vav (Gujarati and Marwari languages), a stepwell in western India or Pakistan