The meaning of INSTANTANEOUS is done, occurring, or acting without any perceptible duration of time. How to use instantaneous in a sentence.

INSTANTANEOUS definition: 1. happening immediately, without any delay: 2. happening immediately, without any delay: 3…. Learn more.

INSTANTANEOUS definition: occurring, done, or completed in an instant. See examples of instantaneous used in a sentence.

Definition of instantaneous adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Dec 14, 2025 · instantaneous (not comparable) Occurring, arising, or functioning without any delay; happening within an imperceptibly brief period of time. [from 17th c.] synonyms quotations …

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

Something that is instantaneous happens immediately and very quickly. Death was instantaneous because both bullets hit the heart.

1. Occurring or completed without perceptible delay: Relief was instantaneous. 2. Done or made as quickly or directly as possible: an instantaneous reply to my letter. 3. Present or occurring at a …

We got an almost instantaneous response from the company. Their deaths were instantaneous.

instantaneous, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary