Firstly fair use does not mean you can just take whatever copyrighted material you like and use it  Nonfree content cannot be used in cases where a free content equivalent with an acceptable quality sufficient to serve the encyclopedic purpose is available or could be created  Lifting a definition from an external source instead of writing your own is not an example of fair use Secondly as you seem to think that something can only be redundant if its an exact copy lets have a look at the two definitions piece by piece  border  Wikipedia definition  Copied definition  Comparison   A tax from the Latin taxo rate is a financial charge or other levy  According to Blacks Law Dictionary a tax is a pecuniary burden  Equivalent in meaning  imposed upon a taxpayer an individual or legal entity laid upon individuals or property owners  Equivalent in meaning  by a state or the functional equivalent of a state to support the government  a payment exacted by legislative authority   Equivalent in meaning  such that failure to pay is punishable by law It is not a voluntary payment or donation but an enforced contribution exacted pursuant to legislative authority   Equivalent in meaning  Taxes are also imposed by many administrative divisions Taxes consist of direct or indirect taxes and may be paid in money or as its labour equivalent and is any contribution imposed by government  whether under the name of toll tribute tallage gabel impost duty custom excise subsidy aid supply or other name  Oooh  Slightly different  And how very useful a list of obscure alternative words for tax is too  If you really desperately need to include the list of obscure alternative words for tax the way to do it is to list some of the terms and cite the source from which they came  Simple huh  The way not to do it is to copy and paste the entire chunk of text verbatim And thirdly you may be flabbergasted to know that IP addresses are often not static  The first edit from this IP address is from yesterday  The first edit from this editor was in   There is no contradiction there despite what you seem to want to believe