Loss

Loss may refer to:

• Economic loss
• Grief, an emotional response to loss
• Animal loss, grief over the loss of an animal

• 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
• , power loss incured due to circuit switching
• Lick Observatory Supernova Search (LOSS) program

• Loss (Bass Communion album) (2006)
• Loss (Mull Historical Society album) (2001)

• "Losses" (Lil Tjay song) (2020)
• "Loss", a song by God Is an Astronaut from their self-titled album (2008)
• "Loss", a song by Madder Mortem from Mercury (1999)
• "Loss", a song by Underoath from The Place After This One (2025)
• "Losses", a song by Drake from Dark Lane Demo Tapes (2020)
• "Losses", a song by Polo G from Hall of Fame (2021)

• "Loss" ( Ctrl+Alt+Del), a webcomic strip and internet meme
• Loss (film), a 2008 film by Maris Martinsons
• Lord Loss (character), a character from Darren Shan's The Demonata
• "The Loss", a 1990 episode of Star Trek: The Next Generation

• Loss (surname)
• Loss (baseball), a pitching statistic in baseball
• League of Secessionist States (LoSS), an intermicronational organisation

• Attenuation, a reduction in amplitude and intensity of a signal
• Lose (disambiguation)
• Lost (disambiguation)
• Losing (disambiguation)
• Stop loss (disambiguation)