<p><strong>Noun</strong></p><ul><li>a reduction or decrease in numbers, size, or strength: Our club has had a high rate of attrition because so many members have moved away.</li><li>a wearing down or weakening of resistance, especially as a result of continuous pressure or harassment: The enemy surrounded the town and conducted a war of attrition.</li><li>a gradual reduction in workforce without firing or layoff of personnel, as when workers resign or retire and are not replaced.</li><li>the act of rubbing against something; friction.</li><li>a wearing down or away by friction; abrasion.</li><li>Theology: imperfect contrition.</li></ul>