instantaneous


in·stan·ta·neous

adjective \ˌin(t)-stən-ˈtā-nē-əs, -nyəs\

: happening very quickly : happening in an instant

Full Definition of INSTANTANEOUS

1
:  done, occurring, or acting without any perceptible duration of time <death was instantaneous>
2
:  done without any delay being purposely introduced <took instantaneous corrective action>
3
:  occurring or present at a particular instant <instantaneous velocity>
in·stan·ta·ne·i·ty \ˌin-ˌstan-tə-ˈnē-ə-tē, ˌin(t)-stən-tə-ˈnē-\ noun
in·stan·ta·neous·ly \ˌin(t)-stən-ˈtā-nē-əs-lē, -nyəs-lē\ adverb
in·stan·ta·neous·ness noun

Examples of INSTANTANEOUS

  1. We got an almost instantaneous response from the company.
  2. <the thunder following the flash of lightning was nearly instantaneous>

Origin of INSTANTANEOUS

Medieval Latin instantaneus, from instant-, instans, noun
First Known Use: 1651

Rhymes with INSTANTANEOUS

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