Laughter, n. An interior convulsion, producing a distortion of the features and accompanied by inarticulate noises. It is infectious and, though intermittent, incurable.
Ambrose BiercePRESIDE, v. To guide the action of a deliberative body to a desirable result. In Journalese, to perform upon a musical instrument; as, "He presided at the piccolo."
Ambrose Bierce