adv

instantaneously

adv

In a way that happens immediately, with no perceptible delay.

"The lights came on instantaneously when he flipped the switch."

How to Use Instantaneously

Learner’s notes

In plain EnglishThe adverb form of "instantaneous" — done or happening at once.

Common pairings

react instantaneously happen instantaneously

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The lights came on _____ when he flipped the switch.

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