<p><strong>Noun</strong></p><ul><li>Geography: Either of two corresponding parallels of latitude on the terrestrial globe, one tropic of Cancer about 23½° N, and the other tropic of Capricorn about 23½° S of the equator, being the boundaries of the Torrid Zone.</li><li>The tropics, the regions lying between and near these parallels of latitude; the Torrid Zone and neighboring regions.</li><li>Astronomy: Either of two circles on the celestial sphere, one lying in the same plane as the tropic of Cancer, the other in the same plane as the tropic of Capricorn.</li></ul><p><strong>Adjective</strong></p><ul><li>Of, pertaining to, characteristic of, or occurring in the tropics; tropical: romance under the tropic skies of Old Mexico.</li></ul>