<p><strong>Verb</strong></p><ul><li>(used without object)<ul><li>To laugh in a restrained, self-conscious, or affected way, as from nervousness or in ill-suppressed amusement.</li><li>Synonyms: giggle, snigger, snicker</li></ul></li></ul><p><strong>Noun</strong></p><ul><li>A tittering laugh.</li></ul>