Biological sense: the chemical processes that occur within a living organism to maintain life. Common in medical and health contexts.
Exercise activates your metabolism.
Metabolism (architectural movement)
Refers to the Japanese architectural movement of the 1960s that envisioned cities as living, growing organisms. Capitalized in English to distinguish from the biological term.
Metabolism was an architectural movement led by figures such as Kisho Kurokawa and Kiyonori Kikutake.