Pronunciation: (un-tī'), [key]
—v., -tied, -ty•ing.
1. to loose or unfasten (anything tied); let or set loose by undoing a knot.
2. to undo the string or cords of.
3. to undo, as a cord or a knot; unknot.
4. to free from restraint.
5. to resolve, as perplexities.
to become untied.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.