1. preen, plume -- (clean with one's bill; "The birds preened")
2. preen, congratulate -- (pride or congratulate (oneself) for an achievement)
3. preen, primp, plume, dress -- (dress or groom with elaborate care; "She likes to dress when going to the opera")
1.
Swans from Anna Liffey swim down here sometimes to preen themselves. - from Ulysses by James Joyce