fall upon

VERB /fɔl_ə'pɑn/
9 LETTERS · STARTS WITH F

fall upon is a valid 9-letter word worth 13 points in Scrabble and 18 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
F4A1L1L1U1P3O1N1
4 + 1 + 1 + 1 + 0 + 1 + 3 + 1 + 1 =13 PTS
DOUBLE WORD → 26TRIPLE WORD → 39
MEANING

What does fall upon mean?