investment trust

NOUN /ɪn'vɛstmənt_trəst/
16 LETTERS · 3 SYLLABLES · STARTS WITH I

investment trust is a valid 16-letter word worth 20 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
I1N1V4E1S1T1M3E1N1T1T1R1U1S1T1
1 + 1 + 4 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 =20 PTS
DOUBLE WORD → 40TRIPLE WORD → 60
MEANING

What does investment trust mean?