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un‧pack

1 [intransitive and transitive] to take everything out of a box, bag, suitcase etc :
I haven't had a chance to unpack yet.
She unpacked her suitcase and headed for the beach.
Maggie carefully unpacked the gifts she had bought.
I haven't had a chance to unpack yet.
She unpacked her suitcase and headed for the beach.
Maggie carefully unpacked the gifts she had bought.2 [transitive] to make an idea or problem easier to understand by considering all the parts of it separately :
Some of the issues surrounding mental illness have been unpacked in Chapter 3.
Some of the issues surrounding mental illness have been unpacked in Chapter 3.