WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
the quality of being unresponsive; not reacting; as a quality of people, it is marked by a failure to respond quickly or with emotion to people or events
Word Usage
"(Caregivers of children who may have potentially life threatening signs and symptoms, such as unresponsiveness, or respiratory distress and/or cyanosis [blue-colored skin], should be instructed to dial 911.)"