say it: mahn-SOON
monsoon is a noun meaning "a seasonal wind in southern Asia; blows from the southwest (bringing rain) in summer and from the northeast in winter". It carries 3 recorded senses.
a seasonal wind in southern Asia; blows from the southwest (bringing rain) in summer and from the northeast in winter
rainy season in southern Asia when the southwestern monsoon blows, bringing heavy rains
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 monsoon 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.