aptitude

NOUN /æptɪ,tud/
8 LETTERS · 3 SYLLABLES · STARTS WITH A

aptitude is a valid 8-letter word worth 11 points in Scrabble and 13 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
A1P3T1I1T1U1D2E1
1 + 3 + 1 + 1 + 1 + 1 + 2 + 1 =11 PTS
DOUBLE WORD → 22TRIPLE WORD → 33
MEANING

What does aptitude mean?