<p><strong>Noun</strong></p><ul><li>a quick, involuntary inhalation that follows a spasm of the diaphragm and is suddenly checked by closure of the glottis, producing a short, relatively sharp sound</li><li>the condition of having such spasms</li><li>a minor difficulty, interruption, setback, etc.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>hiccuped or hiccupped</li><li>hiccuping or hiccupping</li><li>to make the sound of a hiccup</li><li>to have the hiccups</li></ul><p><strong>Informal</strong></p><ul><li>to experience a temporary decline, setback, interruption, etc.</li></ul>