trademark dilution

/T R EY1 D M AA0 R K D AY0 L UW0 SH AH0 N/
noun
  1. 1

    (copyright law) The use of an image, sign, expression, etc. sufficiently close to one that is trademarked that it causes confusion ("blurs") about or brings disrepute ("tarnishes") to the trademarked item.

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