legitimise

VERB /lɪ'dʒɪtə,maɪz/
10 LETTERS · 4 SYLLABLES · STARTS WITH L

legitimise is a valid 10-letter word worth 13 points in Scrabble and 16 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
L1E1G2I1T1I1M3I1S1E1
1 + 1 + 2 + 1 + 1 + 1 + 3 + 1 + 1 + 1 =13 PTS
DOUBLE WORD → 26TRIPLE WORD → 39
MEANING

What does legitimise mean?