Attrition may refer to *

Attrition warfare Attrition warfare is a military strategy consisting of belligerent attempts to win a war by wearing down the enemy to the point of collapse through continuous losses in personnel and materiel. The word ''attrition'' comes from the Latin root , m ...

, the military strategy of wearing down the enemy by continual losses in personnel and material **

War of Attrition The War of Attrition ( ar, حرب الاستنزاف, Ḥarb al-Istinzāf; he, מלחמת ההתשה, Milhemet haHatashah) involved fighting between Israel and Egypt, Jordan, the Palestine Liberation Organisation (PLO) and their allies from ...

, fought between Egypt and Israel from 1968 to 1970 ** War of attrition (game), a model of aggression in game theory *Loss of personnel by

withdrawal (military) A tactical withdrawal or retreating defensive action is a type of military operation, generally meaning that retreating forces draw back while maintaining contact with the enemy. A withdrawal may be undertaken as part of a general retreat, to ...

Attrition (research) In science, attrition are ratios regarding the loss of participants during an experiment. Attrition rates are values that indicate the participant drop out. Higher attrition rates are found in longitudinal studies. See also * Intention-to-treat ...

, loss of participants during an experiment * Attrition (dental), loss of tooth structure by mechanical forces from opposing teeth * Attrition (erosion), the wearing away of rocks in rivers or the sea * ''Attrition'' (film), also known as ''Final Mission'', 2018 american film *

Imperfect contrition In Christianity, contrition or contriteness (, i.e. crushed by guilt) is repentance for sins one has committed. The remorseful person is said to be ''contrite''. A central concept in much of Christianity, contrition is regarded as the first step ...

, also known as attrition, in Catholic theology *

Customer attrition Customer attrition, also known as customer churn, customer turnover, or customer defection, is the loss of clients or customers. Banks, telephone service companies, Internet service providers, pay TV companies, insurance firms, and alarm monitorin ...

, loss of business clients or customers *

Language attrition Language attrition is the process of losing a native or first language. This process is generally caused by both isolation from speakers of the first language ("L1") and the acquisition and use of a second language ("L2"), which interferes with ...

, loss of first language ability by multilingual speakers ** Second language attrition, loss of second language ability

Proper names

Attrition (band) Attrition are an English electronic music band, formed in Coventry in 1980 by Martin Bowes and Julia Niblock. The band emerged from the experimental post-punk scene of the early 1980s and, along with other groups such as Throbbing Gristle, Coi ...

, an electronic music band *

Attrition (website) Attrition is an information security-related website, created in October, 1998, which used to be updated at least weekly by an all-volunteer staff. Until 21 May 2001, Attrition maintained the largest mirror of defaced (or ''cracked'') websites avai ...

, a security website