say it: ah-stuhn-TAY-shuh-slee
ostentatiously is an adverb meaning "with ostentation; in an ostentatious manner". It carries one recorded sense.
with ostentation; in an ostentatious manner
“Mr Khrushchev ostentatiously wooed and embraced Castro at the U.N. general assembly”
Definitions, synonyms and semantic relations for ostentatiously 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.