instantaneous

[ in-stuhn-tey-nee-uhs ]
/ ˌɪn stənˈteɪ ni əs /

adjective

occurring, done, or completed in an instant: an instantaneous response.
existing at or pertaining to a particular instant: the instantaneous position of the rocket.

Origin of instantaneous

From the Medieval Latin word instantāneus, dating back to 1645–55. See instant, -an, -eous

SYNONYMS FOR instantaneous

1 immediate, sudden, abrupt.

OTHER WORDS FROM instantaneous

in·stan·ta·ne·i·ty [in-stan-tn-ee-i-tee, in-stuhn-tuh-nee-] /ɪnˌstæn tnˈi ɪ ti, ˌɪn stən təˈni-/, in·stan·ta·ne·ous·ness, noun in·stan·ta·ne·ous·ly, adverb

Words nearby instantaneous

instant, instant camera, instant message, instant photography, instant replay, instantaneous, instantaneous sound pressure, instanter, instantiate, instantiation, instantize

Example sentences from the Web for instantaneity

British Dictionary definitions for instantaneity

instantaneous
/ (ˌɪnstənˈteɪnɪəs) /

adjective

occurring with almost no delay; immediate
happening or completed within a moment instantaneous death
maths
  1. occurring at or associated with a particular instant
  2. equal to the limit of the average value of a given variable as the time interval over which the variable is considered approaches zeroinstantaneous velocity

Derived forms of instantaneous

instantaneously, adverb instantaneousness or instantaneity (ɪnˌstæntəˈniːɪtɪ), noun