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Loss may refer to:

Arts, entertainment, and media[edit]


Other uses in arts, entertainment, and media[edit]


  • Grief, an emotional response to loss

Mathematics, science, and technology[edit]

  • Angular misalignment loss, power loss caused by the deviation from optimum angular alignment
  • Bridging loss, the loss that results when an impedance is connected across a transmission line
  • Coupling loss, the loss that occurs when energy is transferred from one circuit, optical device, or medium to another
  • Insertion loss, the decrease in transmitted signal power resulting from the insertion of a device in a transmission line or optical fiber
  • Dielectric loss, a dielectric material's inherent dissipation of electromagnetic energy
  • Loss function, in statistics, a function representing the cost associated with an event
  • Path loss, the attenuation undergone by an electromagnetic wave in transit from a transmitter to a receiver
    • Free-space path loss, the loss in signal strength that would result if all influences were sufficiently removed having no effect on its propagation
  • Return loss, the ratio of the amplitude of the reflected wave to the amplitude of the incident wave
  • Round-trip loss in laser physics refers to energy lost due to scattering or absorption
  • Switching loss [de], power loss incured due to circuit switching
  • Lick Observatory Supernova Search (LOSS) program

Other uses[edit]

See also[edit]