CAV and Cav may refer to:

• Cav., in botany, a designator for plants named by Antonio José Cavanilles
• Cavaliere or Cav., an Italian order of knighthood
• Cavalleria rusticana, an opera often played as a double bill with Pagliacci, and then referred to as the Cav/Pag
• CAV Murcia 2005, or Club Atlético Voleibol, a Spanish volleyball club
• CAV Thakral Home Entertainment Co, Ltd., a Chinese DVD and CD distributor
• Cardiac allograft vasculopathy, a complication of heart transplantation
• Cazombo Airport (IATA code), in Cazombo, Angola
• Chicken anaemia virus, a virus that affects poultry
• Clarion Municipal Airport (FAA identifier), in Clarion, Iowa
• Colegio Alemán de Valencia, a German international school in Valencia, Spain
• Combat Assault Vehicle, a miniatures wargame
• Compressed-air vehicle, a vehicle powered by an air engine
• Computer Aided Verification, an annual academic computer science conference
• Connected and autonomous vehicle or self-driving car
• Constant air volume, a type of heating, ventilating, and air-conditioning (HVAC) system
• Constant angular velocity, a qualifier for the rated speed of an optical disc drive
• Consumer Affairs Victoria, a government agency in Victoria, Australia
• County Cavan, Ireland, Chapman code
• Curia advisari vult or c.a.v., a Latin legal term meaning "the court wishes to be advised"
• Lucas CAV, former automotive electrical manufacturer based in Britain
• Mark Cavendish, British cyclist
• X-41 Common Aero Vehicle, a classified U.S. military space plane