tattletale

NOUN /tætəl,teɪl/
10 LETTERS · 3 SYLLABLES · STARTS WITH T

tattletale is a valid 10-letter word worth 10 points in Scrabble and 12 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
T1A1T1T1L1E1T1A1L1E1
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =10 PTS
DOUBLE WORD → 20TRIPLE WORD → 30
MEANING

What does tattletale mean?