Nabla may refer to any of the following:

• the nabla symbol ∇
  • the vector differential operator, also called del, denoted by the nabla
• Nabla, tradename of a type of rail fastening system (of roughly triangular shape)
• Nabla (moth), a genus of moths
• Nabla (instrument), the Greek word for a Phoenician or Hebrew stringed instrument after the triangular shape of which all of the above are named