Definition of "unresponsive" []

• Exhibiting a lack of responsiveness. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In fact, only a small fraction of such treatments have been approved by the Food and Drug Administration, and virtually all the diseases that can be treated with such cells are blood diseases, while diseases of virtually every other organ remain unresponsive to adult stem cells."
• "And later, people with autism are often described as unresponsive, even unaware."
• "I have a client now who probably wouldn't use the word unresponsive, but he would say he never reaches me on the phone."