- not reliable; not to be relied or depended on.
Origin of unreliable
SynonymsSee more synonyms on Thesaurus.com
undependable, irresponsible, untrustworthy.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for unreliability
Tom LeClair on a confusing mix of neuroscience, George W. Bush, and unreliability.The Brain Man: What is E. L. Doctorow Up to?
January 13, 2014
The 2012 unilateral operation against bin Laden was the right call given the unreliability of our Pakistani ally.The Essential Spy Guide
Henry A. Crumpton
May 2, 2013
Roosevelt himself was much annoyed by this unreliability of the mob.The American Credo
George Jean Nathan
Who has not heard the lament about the unreliability of the senses?The Positive Outcome of Philosophy
All this was done to show the unreliability of circumstantial evidence.The Crime of the Century
Henry M. Hunt
These gave the horse the reputation of capriciousness and unreliability.Clever Hans
The Persian post is only exceeded in 167 unreliability by the Persian telegraph.Journeys in Persia and Kurdistan, Volume II (of 2)
Isabella L. Bird
- not reliable; untrustworthyan unreliable witness
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
Word Origin and History for unreliability
Online Etymology Dictionary, © 2010 Douglas Harper