Containment /(?)/

Con·tain·ment

Containment

n.
  1. That which is contained; the extent; the substance. [Obs.]
    The containment of a rich man's estate.
  2. the act of containing.
  3. the act or policy of restricting the influence or territorial growth of a hostile nation. (Diplomacy)
  4. the act of restricting some deleterious substance within a confined space, especially when such material is released unintentionally or by accident; as, containment of nuclear waste; containment of an oil spill. Also used attributively, as a containment boom.
  5. a structure surrounding a nuclear power plant designed to prevent release of radioactive materials into the environment in the event of an accident.