[ uhn-ree-duh-buh l ]
/ ʌnˈri də bəl /


not readable; undecipherable; scribbled: His scrawl was almost unreadable.
not interesting to read; dull; tedious; an unreadable treatise.
extraordinarily difficult to read or comprehend; obscure; incomprehensible: an unreadable dream; an unreadable expression.

Origin of unreadable

First recorded in 1795–1805; un-1 + readable

Related forms

un·read·a·bil·i·ty, un·read·a·ble·ness, nounun·read·a·bly, adverb

Can be confused

illegible illiterate unreadable
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unreadable

British Dictionary definitions for unreadable


/ (ʌnˈriːdəbəl) /


illegible; undecipherable
difficult or tedious to read

Derived Forms

unreadability or unreadableness, noununreadably, adverb
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