from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. That cannot be used: unusable byproducts.
  • adj. Not fit for use: unusable files on corrupted disks.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Not usable.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. not capable of being used


from Wiktionary, Creative Commons Attribution/Share-Alike License

un- +‎ usable


  • It has been called to my attention that the word "I. .evidently unusable" is the equivalent of the N word.

    Traveler's Checks

  • The world is awash in unusable, overly-complex and frustrating software.

    Bringing Women to Computer Science

  • Yeah yeah, language changes and all that, but in this case, the change has just rendered the word unusable by careful writers.

    The enormity!

  • While few pathways are now visible, the area is still studded with bomb craters, old gun positions, wrecked trucks and unexploded cluster bombs that were dropped to render the terrain unusable.

    Potter, Kent B.

  • Venus, our planet's evil sister, has already been identified as unusable for life because of … yes, because of the greenhouse effect that occured in the past.

    Alex Jones' Prison

  • In Japan and South Korea, more users access social networks via mobile than by desktop, so Facebook has some substantial catching up to do given that Olivan admits its mobile site was "unusable" eight months ago.

    How Facebook will take over the world

  • In 2006, Mr. Bot í n says, a government minister admitted that 75.5% of the water pipes in Havana were "unusable" and "recognized that 60% of pumped water was lost before it made it to consumers."

    A Cuban Fairy Tale From PBS

  • I could not have imagined Woods to be a kind of guy whom advertisers might consider "unusable" because of an inability to keep his penis in his pants.

    Richard Laermer: Tiger - and All the Other Untrustworthy Marketing Spokesboys

  • "The team is required to test the viability of the site with a saline solution, but when they flushed the solution through Mr. Broom's IV site the veins became unusable, meaning the saline solution would not flow through his veins," said Julie Walburn, chief communications officer at the Ohio Department of Rehabilitation and Correction.

    Dying in Vein

  • Dizzy Thinks: Passports stolen but are "unusable"?

    Passports stolen but are "unusable"?


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