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Definitions

caffeine

[ka-feen, kaf-een, kaf-ee-in] / kæˈfin, ˈkæf in, ˈkæf i ɪn /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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I enjoy breakfast food a lot, but if I want to have an eventful fun day, I need to just get the breakfast out of the way and get some caffeine in me.

From Los Angeles Times Aug. 14, 2026

I had recently told Mona, my older sister, about the caffeine liaison, and I instantly had regretted it as I glanced at her text.

From Los Angeles Times Aug. 7, 2026

Dr. Rekha Kumar, associate professor of clinical medicine at Weill Cornell Medicine, said most healthy adults can consume up to 400 mg of caffeine a day.

From The Wall Street Journal Aug. 4, 2026

Management at the soft-drink giant said Tuesday that a new version of Mr. Pibb, which has 30% more caffeine and extra cherry flavoring, saw more than 20% volume growth in the second quarter.

From MarketWatch Jul. 28, 2026

Judging from his dilated eyes and his maniacal grin, he didn’t need any more caffeine.

From "The House of Hades" by Rick Riordan




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