(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law; "any derogation of the common law is to be strictly construed"
a contraction of economic activity resulting in a decline of prices
(geology) the erosion of soil as a consequence of sand and dust and loose rocks being removed by the wind; "a constant deflation of the desert landscape"
fail to win; "We lost the battle but we won the war"
suffer the loss of a person through death or removal; "She lost her husband in the war"; "The couple that wanted to adopt the child lost her when the biological parents claimed her"
allow to go out of sight; "The detective lost the man he was shadowing after he had to stop at a red light"
miss from one's possessions; lose sight of; "I've lost my glasses again!"
fail to keep or to maintain; cease to have, either physically or in an abstract sense; "She lost her purse when she left it unattended on her seat"
fail to get or obtain; "I lost the opportunity to spend a year abroad"
fail to make money in a business; make a loss or fail to profit; "I lost thousands of dollars on that bad investment!"; "The company turned a loss after the first year"
(physics) parity is conserved in a universe in which the laws of physics are the same in a right-handed system of coordinates as in a left-handed system
(mathematics) a relation between a pair of integers: if both integers are odd or both are even they have the same parity; if one is odd and the other is even they have different parity; "parity is often used to check the integrity of transmitted data"
(obstetrics) the number of liveborn children a woman has delivered; "the parity of the mother must be considered"; "a bipara is a woman who has given birth to two children"