tax in WordNet English dictionary

1. set or determine the amount of (a payment such as a fine)
   tax  assess 
   
2. use to the limit
   "you are taxing my patience"
   tax  task 
   
3. make a charge against or accuse
   "They taxed him failure to appear in court"
   tax 
   
4. levy a tax on
   "The State taxes alcohol heavily"; "Clothing is not taxed in our state"
   tax 
   

1. charge against a citizen's person or property or activity for the support of government
   tax  taxation  revenue enhancement