Wordnet 3.0
ADJECTIVE (1)
1.
(of hair) colored a moderate reddish-brown;
- Example: "auburn hair"
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.
[1913 Webster]
2. Reddish brown.
[1913 Webster]
His auburn locks on either shoulder flowed.
--Dryden.
[1913 Webster]
WordNet (r) 3.0 (2006):
auburn
adj 1: (of hair) colored a moderate reddish-brown; "auburn hair"