1. to surpass or exceed in preening; to preen more elaborately or thoroughly than someone or something else
Usage: transitive or intransitive; often used in comparative or competitive contexts; literary or informal

Examples

• The peacock outpreened all the other birds in the garden with its magnificent display.
• She outpreened her rival by arriving in an impeccably tailored outfit.
• The male birds outpreen each other during mating season to attract females.
• He spent hours outpreening himself before the important gala.
• The two competitors seemed determined to outpreen one another at the fashion show.