<p><strong>Noun</strong></p><ul><li>the act of fortifying or strengthening.</li><li>something that fortifies or protects.</li><li>the art or science of constructing defensive military works.</li><li>Often fortifications.</li><li>military works constructed for the purpose of strengthening a position; a fort: Supposedly impregnable, the fortifications were quickly overrun.</li><li>Synonyms: bulwark, stronghold, citadel, fortress.</li><li>a strengthening or improvement, as by addition of or intensification with another ingredient: the fortification of milk with vitamin D; the fortification of wine with alcohol.</li></ul>