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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:

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

Coffee and caffeine pills, he said, “do not give me the same mental clarity.”

From The Wall Street Journal Aug. 4, 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

We all knew the effect caffeine had on Ms. Gruwell.

From "The Freedom Writers Diary" by The Freedom Writers




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