<p><strong>Noun</strong></p><ul><li>The act or condition of containing.</li><li>An act or policy of restricting the territorial growth or ideological influence of another, especially a hostile nation.</li><li>An act or policy of limiting the expansion or spread of a natural disaster, contagious disease, or other dangerous thing.</li><li>An enclosure completely surrounding a nuclear reactor, designed to prevent the release of radioactive material in the event of an accident.</li></ul>