verb (used with object)
to refuse to allow; reject; veto: to disallow a claim for compensation.
to refuse to admit the truth or validity of: to disallow the veracity of a report.
Origin of disallow
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
to reject as untrue or invalid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper