n. & adj.
--n. laughter.
--adj. in senses of LAUGH v.
Phrases and idioms:
laughing-gas nitrous oxide as an anaesthetic, formerly used without oxygen and causing an exhilarating effect when inhaled. laughing hyena see HYENA. laughing jackass KOOKABURRA. laughing-stock a person or thing open to general ridicule. no laughing matter something serious.
Derivatives:
laughingly adv.