field of study

NOUN
14 LETTERS · STARTS WITH F

field of study is a valid 14-letter word worth 23 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
F4I1E1L1D2O1F4S1T1U1D2Y4
4 + 1 + 1 + 1 + 2 + 0 + 1 + 4 + 0 + 1 + 1 + 1 + 2 + 4 =23 PTS
DOUBLE WORD → 46TRIPLE WORD → 69
MEANING

What does field of study mean?