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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:

Lynch’s order included a chocolate milkshake and coffee, the cold sugar and caffeine fueling his ideas.

From Los Angeles Times Aug. 18, 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

These shots of concentrated caffeine are meant to be sipped, not sniffed, but one whiff of a ragingly popular one—bouquet de Dubble Bubble and wet sneakers—was enough to put me off them forever.

From The Wall Street Journal Aug. 6, 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

They were laying off sugar or carbs or caffeine or meat or dairy, but maybe a little butter was fine now and then.

From "We Are Okay" by Nina LaCour




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