Merriam-Webster's Collegiate® Dictionary, 11th Edition
PREEN
I. noun
Etymology: Middle English prene, from Old English prēon; akin to Middle High German pfrieme awl Date: before 12th century pin , brooch ,
II. transitive verb
Date: 1572
pin ,
III. verb see: purchase
Date: 14th century
transitive verb to groom with the bill especially by rearranging the barbs and barbules of the feathers and by distributing oil from the uropygial gland, to dress or smooth (oneself) up ; primp , to pride or congratulate (oneself) for achievement, intransitive verb to make oneself sleek, gloat , swell , preener noun