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
instantaneityplay \ˌin-ˌstan-tə-ˈnē-ə-tē, ˌin(t)-stən-tə-ˈnē-\ noun
instantaneouslyplay \ˌin(t)-stən-ˈtā-nē-əs-lē, -nyəs-lē\ adverb
Examples of instantaneous in a Sentence
We got an almost instantaneous response from the company.
the thunder following the flash of lightning was nearly instantaneous
Recent Examples of instantaneous from the Web
While déjà vu is instantaneous and fleeting, déjà vécu (already lived) is far more troubling.
The instantaneous window will open at 5:55 p.m, with a back up time set for Saturday at 5:07 p.m.
That should provide an indication of the Giants’ instantaneous reaction to this Memorial Day ridiculousness.
The relationship persists independently of distance, making possible the near-instantaneous transmission of binary information.
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
First Known Use: 1651
INSTANTANEOUS Defined for English Language Learners
Definition of instantaneous for English Language Learners
: happening very quickly : happening in an instant
INSTANTANEOUS Defined for Kids
Definition of instantaneous for Students
: happening or done very quickly : happening in an instant an instantaneous reply
Seen and Heard
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