grind to a halt

VERB
15 LETTERS · STARTS WITH G

grind to a halt is a valid 15-letter word worth 17 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
G2R1I1N1D2T1O1A1H4A1L1T1
2 + 1 + 1 + 1 + 2 + 0 + 1 + 1 + 0 + 1 + 0 + 4 + 1 + 1 + 1 =17 PTS
DOUBLE WORD → 34TRIPLE WORD → 51
MEANING

What does grind to a halt mean?

VERB · 1 SENSE
1

Be unable to move further.