Definition of "disallow" [dis•al•low]

• To refuse to allow: "[The government] disallowed his aging and dying parents any reunion with their only child” ( John Simon). (verb-transitive)
• To reject as invalid, untrue, or improper. (verb-transitive)

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.

• "Of course I might not get the point I can almost assure you that whether to exempt admins from the username disallow was never considered, so it is neither oversight nor bug."
• "Of course, any site can shut down the indexing of its content by Google any time it wants with a simple "disallow" in its robots. txt file."
• "Sen. Lisa Murkowski, Republican of Alaska, convinced Sen. Harry Reid that there should be a vote to "disallow" the Environmental Protection Agency's scientific finding that global warming represents a danger to human health."