say it: in-stuhn-TAN-ee-uhs
instantaneous is an adjective meaning "occurring with no delay". It is pronounced /ˌɪnstənˈtæniəs/ — in-stuhn-TAN-ee-uhs. It carries one recorded sense.
Definitions, synonyms and semantic relations for instantaneous 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.