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Word of the Day Tuesday, June 9, 2026

instantaneous

/ɪnˈstæntəneɪʃəs/ adjective · British & US
Valid in UKValid in US
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What does instantaneous mean?

adjective

Happening or done in an instant; extremely brief or sudden. Existing or happening at a particular moment.

Example

"The instantaneous reaction to the news was shock and surprise."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for instantaneous

Antonyms of instantaneous

Rhymes with instantaneous

Etymologically related