say it: in-stuhn-TAN-ee-uh-slee
instantaneously is an adverb meaning "without any delay". It is pronounced /ˌɪnstənˈtæniəsli/ — in-stuhn-TAN-ee-uh-slee. It carries one recorded sense.
Definitions, synonyms and semantic relations for instantaneously 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.