vi to fail; to become deficient.
2. defect ·vt to injure; to damage.
3. defect ·noun want or absence of something necessary for completeness or perfection; deficiency;
opposed to superfluity.
4. defect ·noun failing; fault; imperfection, whether physical or moral; blemish; as, a defect in the ear or eye; a defect in timber or iron; a defect of memory or judgment.