Definition of instantaneous
- death was instantaneous
- took instantaneous corrective action
- instantaneous velocity
We got an almost instantaneous response from the company.
the thunder following the flash of lightning was nearly instantaneous
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.
: happening very quickly : happening in an instant
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