Longman Dictionary of Contemporary English homepage

rack

2 verb
     
rack2
1 [transitive usually passive] to make someone suffer great mental or physical pain:
Great sobs racked her body.
be racked by/with something
Her face was racked with pain.
Liza was racked by guilt.
2

rack your brains

to try very hard to remember or think of something:
I racked my brains, trying to remember his name.

rack something ↔ up

phrasal verb
PPVDS to get a number or amount of something, especially a number of points in a competition:
He racked up 41 points.

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