custodian

NOUN /kə'stoʊdiən/
9 LETTERS · 4 SYLLABLES · STARTS WITH C

custodian is a valid 9-letter word worth 12 points in Scrabble and 15 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3U1S1T1O1D2I1A1N1
3 + 1 + 1 + 1 + 1 + 2 + 1 + 1 + 1 =12 PTS
DOUBLE WORD → 24TRIPLE WORD → 36
MEANING

What does custodian mean?