to-do

NOUN /tu_du/
5 LETTERS · 1 SYLLABLE · STARTS WITH T

to-do is a valid 5-letter word worth 5 points in Scrabble and 5 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
T1O1-0D2O1
1 + 1 + 0 + 2 + 1 =5 PTS
DOUBLE WORD → 10TRIPLE WORD → 15
MEANING

What does to-do mean?