1. Loosening the ties that fasten something
   - untying, undoing

1. Cause to become undone
   "unfasten your belt" 
2. Become undone or untied
   "The shoelaces unfastened"

See also: unfastener

Type of: laxation, loosening, open, open up, undo

Antonym: fasten

• shoestring catch
• shoestring fungus
• shoetree
• shofar
• shogi
• shogun
• shogunate
• shoji
• Sholem Asch
• Sholom Asch
• Shona
• shonky
• shoo
• shoo away
• shoo off
• shoo-in
• shoofly
• shoofly pie
• shook
• shoot
• shoot a line
• shoot craps
• shoot for
• shoot one's mouth off
• shoot the breeze