definitive plumage

18 LETTERS · STARTS WITH D

definitive plumage is a valid 18-letter word worth 29 points in Scrabble and 36 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2E1F4I1N1I1T1I1V4E1P3L1U1M3A1G2E1

2 + 1 + 4 + 1 + 1 + 1 + 1 + 1 + 4 + 1 + 0 + 3 + 1 + 1 + 3 + 1 + 2 + 1 =29 PTS

DOUBLE WORD → 58TRIPLE WORD → 87

MEANING

What does definitive plumage mean?