1. A disorder marked by the deposition of amyloid in various organs and tissues of the body. It may be associated with a chronic disease such as rheumatoid arthritis, tuberculosis, or multiple myeloma.
2. A group of conditions of diverse etiologies characterized by the accumulation of insoluble fibrillar proteins (amyloid) in various organs and tissues of the body such that vital function is compromised.
3. A condition marked by the accumulation of a protein-based substance amyloid in the body's organs and tissues.