Oxford Advanced American Dictionary

Definition of tax verb from the Oxford Advanced Learner's Dictionary

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tax

verb
tax pronunciation English tæks tax pronunciation American tæks
 
1 tax somebody/something to put a tax on somebody/something; to make somebody pay taxAny interest payments are taxed as part of your income.His declared aim was to tax the rich.2 tax something (British English) to pay tax on a vehicle so that you may use it on the roadsThe car is taxed until July.3 tax somebody/something to need a great amount of physical or mental effortThe questions did not tax me.The problem is currently taxing the brains of the nation's experts (= making them think very hard).
Phrasal verbs

tax somebody with something

(formal) to accuse somebody of doing something wrongI taxed him with avoiding his responsibility as a parent.