say it: LAF-tur
laughter is a noun meaning "the sound of laughing". It carries 2 recorded senses.
the activity of laughing; the manifestation of joy or mirth or scorn
“he enjoyed the laughter of the crowd”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for laughter come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.