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Nonlocal may refer to:

• Action at a distance, direct interaction of physical objects that are not in proximity
• Conjugated system (or nonlocalized bond), in chemistry, a conjugated system is a system of connected p-orbitals with delocalized electrons in compounds with alternating single and multiple bonds, which in general may lower the overall energy of the molecule and increase stability
• Nonlocal goto, an abstract representation of the control state of a computer program
• Nonlocal Lagrangian, in field theory, a type of functional ${\displaystyle {\mathcal {L}}\phi (x)}$ which contains terms which are nonlocal in the fields i.e. which are not polynomials or functions of the fields or their derivatives evaluated at a single point in the space of dynamical parameters (e.g. space-time)
  • Other nonlocal relationships in physics, such as Pippard's nonlocal generalisation of the Londons' equations for superconductivity
• Non-local means, an algorithm in image processing for image denoising
• Nonlocal operator, which maps functions on a topological space to functions, in such a way that the value of the output function at a given point cannot be determined solely from the values of the input function in any neighbourhood of any point.
• Non-local variable, in programming language theory, a variable that is not defined in the local scope
  • nonlocal, a statement in Python 3 that causes identifiers to refer to their bindings in outer enclosing scopes

See also

• Nonlocality (disambiguation)

• Disambiguation pages