All 7 Uses

auburn
in
The Titan's Curse
(Edited)

She had auburn hair gathered back in a ponytail and strange eyes, silvery yellow like the moon.
Chpt 2

auburn = reddish-brown
Most of the Hunters scattered as tiny holes appeared in the snow at their feet, but the girl with auburn hair just looked up calmly at the helicopter.
Chpt 2
The auburn-haired girl turned toward me.
Chpt 2 *

auburn = colored a moderate reddish-brown
"You are in no condition to be hurling yourself off cliffs," the auburn-haired girl said.
Chpt 2

auburn = reddish-brown
Bianca di Angelo was seated next to the auburn-haired girl, who I still had trouble thinking of as Artemis.
Chpt 3
A few yards ahead of us, gray clouds swirled in a heavy vortex, making a funnel cloud that almost touched the mountaintop, but instead rested on the shoulders, of a twelve-year-old girl with auburn hair and a tattered silvery dress: Artemis, her legs bound to the rock with celestial bronze chains.
Chpt 16
The goddess slid down from her throne and turned to human size, a young auburn-haired girl, perfectly at ease in the midst of the giant Olympians She walked toward us, her silver robes shimmering.
Chpt 19

Definitions:

(1) (auburn as in: auburn hair)
colored a moderate reddish-brown -- especially of hair
(2) (meaning too common or too rare to warrant focus)
More commonly, as a proper noun (capitalized), Auburn is the name of an important university and city in Alabama, and of various cities in the USA and elsewhere in the world.