noun
1. : the confinement of prisoners to their cells for all or most of the day as a temporary security measure
2. : a temporary closing of a school wherein students are kept in locked classrooms for safety during a threat of danger
noun
1. : the confinement of prisoners to their cells for all or most of the day as a temporary security measure
2. : a temporary closing of a school wherein students are kept in locked classrooms for safety during a threat of danger
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012