noun.
A device, such as a clip, pin, or clasp, that attaches something firmly to something else.
noun.
A device, such as a seat belt, that secures a person or object.
The Century Dictionary and Cyclopedia
noun.
One who or that which makes fast or firm; one who fastens; specifically, something used for fastening and unfastening, as in dress, or for making fast or fixed, as a mordant in dyeing.
noun.
A warrant. Grose;
the GNU version of the Collaborative International Dictionary of English