Definitions from Wiktionary ( )

▸ verb:  (transitive) To separate (something that is wound up)
▸ verb:  (transitive, obsolete) To disentangle
▸ verb:  (intransitive, colloquial) To relax; to chill out; to rest and become relieved of stress
▸ verb:  (intransitive) To be or become unwound; to be capable of being unwound or untwisted.
▸ verb:  (transitive, finance) To close out a position, especially a complicated position.
▸ verb:  (transitive, finance) To undo something.
▸ verb:  (transitive, programming) To analyse (a call stack) so as to generate a stack trace etc.
▸ verb:  (transitive, figurative) To unravel or explain.
▸ noun:  Any mechanism or operation that unwinds something.

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