Definition of loosen

• v. t. - To make loose; to free from tightness, tension, firmness, or fixedness; to make less dense or compact; as, to loosen a string, or a knot; to loosen a rock in the earth.
• v. t. - To free from restraint; to set at liberty..
• v. t. - To remove costiveness from; to facilitate or increase the alvine discharges of.
• v. i. - To become loose; to become less tight, firm, or compact.