Auburn/ˈɔːbərn/ Definition 1 of 1Pro Tip 1/3Hair Color Specific Primarily used to describe human hair, sometimes horse coats, not objects or other colors. He admired his horse's shiny auburn coat. Pro Tip 2/3Not Bright Red Auburn is a muted, natural red, distinct from bright or artificial red hues. The leaves turned a soft auburn, not the vibrant red of last fall. Pro Tip 3/3Autumnal Associations The color auburn often evokes the feeling of autumn due to its resemblance to fall foliage. Her auburn scarf matched the season's palette.