The Collaborative International Dictionary of English v.0.48:

Auburn \Au"burn\, a. [OE. auburne blonde, OF. alborne, auborne,
   fr. LL. alburnus whitish, fr. L. albus white. Cf. Alburn.]
   1. Flaxen-colored. [Obs.] --Florio.
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   2. Reddish brown.
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            His auburn locks on either shoulder flowed.
                                                  --Dryden.
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