• Separable spaces in topology.
• Separable sigma algebras in measure theory.
• Separable differential equations.
• Separable partial differential equations.
• Separable polynomials.
• Separable extension in field theory.
• Separable states in quantum mechanics, states without quantum entanglement.

In arbitration law, separability describes the principle that an arbitration clause is considered separate from the contract in which it is contained.