To unpack is to take stuff out that's been packed, like the clothing in your suitcase or the fragile item that's been buried in ten thousand Styrofoam peanuts.

If a large shipment arrives at a company, it may take several people to unpack the items and take stock of the contents. We also use unpack to describe analyzing something by taking it apart. This is sort of like unpacking a box or unpacking your luggage, because you're dismantling the components of something, but it's more likely an idea than a physical object.

Definitions of unpack
  1. verb
    remove from its packing
    unpack the presents”
    synonyms: take out
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    arrange in a container
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    bring out, get out
    take out of a container or enclosed space
    remove from a box
    break out
    take from stowage in preparation for use
    remove from the crate
    winkle, winkle out
    remove or displace from a position
    type of:
    remove, take, take away, withdraw
    remove something concrete, as by lifting, pushing, or taking off, or remove something abstract
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