Rock Falls

Rock Falls

noun
a city in NW Illinois.
Dictionary.com Unabridged

rockfall

[rok-fawl]
noun
1.
an act or instance of the falling of rock, as in a cave-in or an avalanche.
2.
a mass of rocks that have fallen: to be trapped under a rockfall.

Origin:
1920–25; rock1 + fall

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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