The practice of embedding a large number of hyperlinks on a website in exchange for return links, intended to inflate the apparent popularity of the website.

(Internet, informal, derogatory) The practice of going out of one's way to place links to one's website on someone else's web page.

(chemistry, of a polymer) Having links between adjacent chains.

simple past tense and past participle of cross-link

(chemistry) A covalent bond (or series of bonds) between adjacent chains of a polymer / (biochemistry) A similar bond between strands of nucleic acid

(chemistry) To join polymer chains together to form one single molecule. An object made from a crosslinked material contains only one supergiant molecule. Crosslinking may take place through covalent bonds or ionic bonds

(computing) A website containing many hyperlinks, especially one designed to increase the index ranking of other websites to search engines.

Copula, copulative verb.

(colloquial) A hypothetical primate once thought necessary to explain a perceived evolutionary gap between apes and humans. / (figuratively) Any sought-after or valuable intermediary figure or position.

(firearms) A pressed metal or plastic link, used to join cartridges for a machine gun. When the cartridge is removed during loading, the link is expelled.