Definition of "no-go" []

• Not in a suitable condition for proceeding or functioning properly: The space launch was no-go. (adjective)
• A situation in which planned operations cannot be effectuated, as in the case of the launch of spacecraft: The flight is a no-go because of technical problems. (noun)

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.

• "Several slums on the edge of Karachi are described as no-go zones that are too risky for police and security forces."
• "This is not the first time NFC has been called a no-go for the next iPhone."
• "The block, Morga-II, is in the restricted mining zone in forest areas, also known as the "no-go" area."