Full Definition of need. 1 : necessary duty : obligation. 2 a : a lack of something requisite, desirable, or useful b : a physiological or psychological requirement for the well-being of an organism. 3 : a condition requiring supply or relief. 4 : lack of the means of subsistence : poverty.

I would say you may qualify under definition 2b. if you consider yourself an organism....and thereby we can dispense with the definition of "want"

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