Laugh \Laugh\ (l[aum]f), v. i. [imp. & p. p. Laughed (l[aum]ft); p. pr. & vb. n. Laughing.]


1. To show mirth, satisfaction, or derision, by peculiar movement of the muscles of the face, particularly of the mouth, causing a lighting up of the face and eyes, and usually accompanied by the emission of explosive or chuckling sounds from the chest and throat; to indulge in laughter. [1913 Webster]