/ Dictionary / Index U unthread: Meaning and Definition of Find definitions for: un•thread Pronunciation: (un-thred'), [key] — v.t. to draw out or take out the thread from: to unthread a sewing machine. to thread one's way through or out of, as a densely wooded forest. 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. unthought unthrone Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language