The process of putting items into containers for storage, transport, or protection, or material used to fill spaces.
From Middle Dutch 'pak' meaning bundle or pack, related to 'pakken' (to seize, pack). The sense evolved from gathering things together to the systematic arrangement for transport.
The phrase 'packing heat' (carrying a gun) comes from 1930s American slang, where 'pack' meant to carry concealed items. Professional packers can fit 30% more items in the same space as amateurs by using mathematical tessellation principles.
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