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defrost

[dih-frawst, -frost] /dɪˈfrɔst, -ˈfrɒst/
verb (used with object)
1.
to remove the frost or ice from:
to defrost a refrigerator; to defrost the windshield of a car.
2.
to thaw or partially thaw (frozen food).
verb (used without object)
3.
to become free of ice or frost:
The refrigerator defrosted quickly.
4.
to thaw, as frozen food:
The meat took two hours to defrost.
Origin
1890-1895
1890-95; de- + frost
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for de frost

defrost

/diːˈfrɒst/
verb
1.
to make or become free of frost or ice
2.
to thaw, esp through removal from a refrigerator
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for de frost

defrost

v.

1895, from de- + frost. Related: Defrosted; defrosting.

Online Etymology Dictionary, © 2010 Douglas Harper
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Word Value for de

3
3
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