<p><strong>Verb</strong></p><ul><li>(used without object) to remain silent or hold oneself aloof in a sullen, ill-humored, or offended mood: Promise me that you won't sulk if I want to leave the party early.</li></ul><p><strong>Noun</strong></p><ul><li>a state or fit of sulking.</li><li>sulks, ill-humor shown by sulking: to be in the sulks.</li><li>Also sulker: a person who sulks.</li></ul>