Etymology
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deep-freeze (n.)

registered trademark (U.S. Patent Office, 1941) of a type of refrigerator; used generically for "cold storage" since 1949.

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Definitions of deep-freeze

deep-freeze (n.)
electric refrigerator (trade name Deepfreeze) in which food is frozen and stored for long periods of time;
Synonyms: Deepfreeze / deep freezer / freezer
From wordnet.princeton.edu