(of animals, esp. birds) to trim or dress (feathers, fur, etc.) with the beak or tongue

The peacock preened itself on the lawn.

to dress (oneself) carefully or smartly; primp

The king preened himself in his elaborate ceremonial robes.

to pride (oneself) on an achievement, personal quality, etc.

He preened himself on having been graduated with honors.

to make oneself appear striking or smart in dress or appearance

No amount of careful preening will compensate for poor posture.

to be exultant or proud.

verb

beautify , clean , doll up , groom , prettify , pretty , primp , prink , spruce up , tidy , congratulate , plume , adorn , dress , neaten , perk , press , pride , prune , smooth , spruce , trim