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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.

See Examples For:

Asked what he is missing the most during his month-long challenge, he said: "It's got to be caffeine."

From BBC Sep. 8, 2026

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

After all, each 5.3-ounce cup contained about 32 milligrams of caffeine, or about a third of an 8-ounce cup of coffee.

From The Wall Street Journal Aug. 3, 2026

"These include caffeine, capsaicin, menthol and vanillin, not to mention the fact that many of the medicines we use today either come directly from plants or are inspired by plant chemistry."

From Science Daily Aug. 3, 2026

“Perk—we need some caffeine and sugar. I can’t have you Eeyoring it up tomorrow at Midsummer Night, Miss Director. So we’re going to flush this whatever-it-is out of your system. Let’s go.”

From "From Twinkle, with Love" by Sandhya Menon




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