Definition of cold frame
: a usually glass- or plastic-covered frame without artificial heat used to protect plants and seedlings outdoors
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First Known Use of cold frame
1851
COLD FRAME Defined for English Language Learners
cold frame
Definition of cold frame for English Language Learners
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: a small wooden or metal frame covered with glass or plastic that is used for growing and protecting plants in cold weather
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Britannica.com: Encyclopedia article about cold frame
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