Meaning of unthread

un•thread

Pronunciation: (un-thred'), [key]
— v.t.
  1. to draw out or take out the thread from: to unthread a sewing machine.
  2. to thread one's way through or out of, as a densely wooded forest.
  3. to disentangle; separate out of a raveled or confused condition: to unthread a mystery.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.