instrumental score

18 LETTERS · STARTS WITH I

instrumental score is a valid 18-letter word worth 21 points in Scrabble and 27 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1S1T1R1U1M3E1N1T1A1L1S1C3O1R1E1

1 + 1 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 3 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does instrumental score mean?