say it: BIL-oh-ing
billowing is an adjective meaning "characterized by great swelling waves or surges". It is pronounced /ˈbɪloʊɪŋ/ — BIL-oh-ing. It carries one recorded sense.
Definitions, synonyms and semantic relations for billowing 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.