<p><strong>Noun</strong></p><ul><li>A child surreptitiously or unintentionally substituted for another.</li><li>In folklore, an ugly, stupid, or strange child left by fairies in place of a pretty, charming child.</li><li>Philately: a postage stamp that, by accident or intention, has been chemically changed in color.</li><li>Archaic: a renegade or turncoat; an imbecile.</li></ul>