• Physical wear
• Loss of personnel by retirement
• Attrition (medicine, epidemiology), the loss of participants during an experiment
• Attrition (dental), the loss of tooth structure by mechanical forces from opposing teeth
• Attrition (weathering), the wearing away of rocks in the sea
• Imperfect contrition, also known as attrition, in Catholic theology
• Attrition warfare, the military strategy of wearing down the enemy by continual losses in personnel and material
• Customer attrition, a business term used to describe loss of clients or customers
• Language attrition, the loss of a first or second language or a portion of that language by either a community or an individual
• War of Attrition, a limited war fought between Egypt and Israel from 1968 to 1970

proper names:

• Attrition (website), a website related to information security
• War of attrition (game), a model of aggression in game theory, formulated by John Maynard Smith
• Attrition (band), an electronic music band

See also

• deterioration