Meaning of unfasten

un•fas•ten

Pronunciation: (un-fas'un, -fä'sun), [key]
— v.t.
  1. to release from or as from fastenings; detach.
  2. to undo or open (something fastened).
—v.i.
  1. to become unfastened.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also: