Framework structures designed to hold, store, or display objects. Can also refer to torture devices or a woman's breasts in slang usage.
From Middle Dutch 'rec' meaning 'framework' or 'stretcher.' The torture device meaning developed from the rack's ability to stretch objects, later extending to various storage and display frameworks.
The phrase 'rack your brain' comes from the torture device meaning—you're stretching your mind painfully to remember something. Modern server racks in data centers maintain the basic concept of organized storage that has existed since medieval times.
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