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[dih-duhk-tuh-buh l]
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  1. capable of being deducted.
  2. allowable as a tax deduction: Charitable contributions are deductible expenses.
  1. the amount for which the insured is liable on each loss, injury, etc., before an insurance company will make payment: The deductible on our medical coverage has been raised from $50 to $100 per illness.

Origin of deductible

First recorded in 1855–60; deduct + -ible
Related formsde·duct·i·bil·i·ty, nounnon·de·duct·i·bil·i·ty, nounnon·de·duct·i·ble, adjective, nounun·de·duct·i·ble, adjective
Can be confuseddeducible deductible
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for deductibility


  1. capable of being deducted
  2. US and Canadian short for tax-deductible
  1. insurance, US and Canadian a specified contribution towards the cost of a claim, stipulated on certain insurance policies as being payable by the policyholderAlso called (in Britain and certain other countries): excess
Derived Formsdeductibility, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for deductibility



1610s, "that may be deduced," also "that may be deducted;" from Latin deducere (see deduce) + -ible. As a noun, "deductible thing," by 1927.

Online Etymology Dictionary, © 2010 Douglas Harper