01 n. That which is contained; the extent; the substance.
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1.
That which is contained; the extent; the substance.[Obs.]“The containment of a rich man's estate.” — Fuller.
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2.
the act of containing.
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3.
the act or policy of restricting the influence or territorial growth of a hostile nation.(Diplomacy)
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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.
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5.
a structure surrounding a nuclear power plant designed to prevent release of radioactive materials into the environment in the event of an accident.