'duty-free' definitions:

Definition of 'duty-free'

(from WordNet)
adjective
Exempt from duty; "duty-free liquor"

Definition of 'duty-free'

From: GCIDE
  • nontaxable \nontaxable\ adj. Not subject to taxation; -- of goods imported into a country or sold at retail outlets; as, most laws imposing sales taxes make food nontaxable. Opposite of taxable. [Narrower terms: duty-free; tax-exempt, tax-free; unratable; {untaxed ] Also See: exempt. [WordNet 1.5]