adjective. ['dɪˈdʌktəbəl'] acceptable as a deduction (especially as a tax deduction).
noun. ['dɪˈdʌktəbəl'] (taxes) an amount that can be deducted (especially for the purposes of calculating income tax).
noun. ['dɪˈdʌktəbəl'] a clause in an insurance policy that relieves the insurer of responsibility to pay the initial loss up to a stated amount.