revitalisation

NOUN
14 LETTERS · 6 SYLLABLES · STARTS WITH R

revitalisation is a valid 14-letter word worth 17 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
R1E1V4I1T1A1L1I1S1A1T1I1O1N1
1 + 1 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =17 PTS
DOUBLE WORD → 34TRIPLE WORD → 51
MEANING

What does revitalisation mean?