instantaneous

adjective in·stan·ta·neous \ ˌin(t)-stən-ˈtā-nē-əs , -nyəs \
Updated on: 1 Dec 2017

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

instantaneity

play \ˌin-ˌstan-tə-ˈnē-ə-tē, ˌin(t)-stən-tə-ˈnē-\ noun

instantaneously

play \ˌin(t)-stən-ˈtā-nē-əs-lē, -nyəs-lē\ adverb

instantaneousness

noun

Examples of instantaneous in a Sentence

  1. We got an almost instantaneous response from the company.

  2. the thunder following the flash of lightning was nearly instantaneous

Recent Examples of instantaneous from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'instantaneous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of instantaneous

Medieval Latin instantaneus, from instant-, instans, noun


INSTANTANEOUS Defined for English Language Learners

instantaneous

adjective

Definition of instantaneous for English Language Learners

  • : happening very quickly : happening in an instant


INSTANTANEOUS Defined for Kids

instantaneous

adjective in·stan·ta·neous \ ˌin-stən-ˈtā-nē-əs \

Definition of instantaneous for Students

: happening or done very quickly : happening in an instant
  • an instantaneous reply

instantaneously

adverb


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