Word of the Day - Laughter March 5, 2012 Christian Ledan laugh·ter[laf-ter, lahf-] noun 1. the action or sound of laughing . 2. an inner quality, mood, disposition, etc., suggestive of laughter; mirthfulness: a man of laughter and goodwill. 3. an expression or appearance of merriment or amusement. 4. Archaic . an object of laughter; subject or matter for amusement.