Definition of "disallowance" [dis•al•low•ance]

• The action of not allowing, or of withdrawing allowance. (noun)

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• "'disallowance' under which the Crown occasionally annuls colonial Acts which have received the assent of a colonial Governor."
• "The disallowance equal to 7.5% of adjusted gross income is a high hurdle, but those who qualify shouldn't overlook all possible expenses, listed in IRS publication 502 ."
• "Taxpayers may deduct 100% of the car's cost in the first year—subject to the personal use disallowance, of course."