<p><strong>Noun</strong></p><ul><li>A strict isolation imposed to prevent the spread of disease.</li><li>A period, originally 40 days, of detention or isolation imposed upon ships, persons, animals, or plants on arrival at a port or place, when suspected of carrying some infectious or contagious disease.</li><li>A system of measures maintained by governmental authority at ports, frontiers, etc., for preventing the spread of disease.</li><li>The branch of the governmental service concerned with such measures.</li><li>A place or station at which such measures are carried out, as a special port or dock where ships are detained.</li><li>The detention or isolation enforced.</li><li>The place, especially a hospital, where people are detained.</li><li>A period of 40 days.</li><li>Social, political, or economic isolation imposed as a punishment, as in ostracizing an individual or enforcing sanctions against a foreign state.</li></ul><p><strong>Verb</strong></p><ul><li>To put in or subject to quarantine.</li><li>To exclude, detain, or isolate for political, social, or hygienic reasons.</li></ul>