<p><strong>Noun</strong></p><ul><li>the act of linking; link; state or manner of being linked.</li><li>a system of links.</li><li>an association between two or more genes on a chromosome that tends to cause the characteristics determined by these genes to be inherited as an inseparable unit.</li><li>a factor or relationship that connects or ties one thing to another; link.</li><li>any of various mathematical or drawing devices consisting of a combination of bars or pieces pivoted together so as to turn about one another, usually in parallel planes.</li><li>flux linkage.</li></ul><p><strong>Verb</strong></p><ul><li>to attach firmly or securely in place; fix securely to something else.</li><li>to make secure, as an article of dress with buttons, clasps, etc., or a door with a lock, bolt, etc.</li><li>to enclose securely, as a person or an animal (usually followed by in): to fasten a monkey in a cage.</li><li>to direct (the eyes, thoughts, etc.) intently: to fasten one's eyes on a speaker.</li><li>to keep one's temper in leash.</li></ul>