bound variable

14 LETTERS · STARTS WITH B

bound variable is a valid 14-letter word worth 21 points in Scrabble and 27 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3O1U1N1D2V4A1R1I1A1B3L1E1

3 + 1 + 1 + 1 + 2 + 0 + 4 + 1 + 1 + 1 + 1 + 3 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does bound variable mean?