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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.

"I think mate is gonna be the next thing," says Adam Leahy, 23, highlighting its taste and high caffeine content.

From BBC • May 8, 2026

It's less bitter than green tea, with a low caffeine content - and it's creeping onto café menus.

From BBC • May 8, 2026

Coca-Cola HBC CCH 3.41%increase; green up pointing triangle reported organic sales growth led by blockbuster caffeine consumption.

From The Wall Street Journal • May 7, 2026

Only participants consuming caffeine experienced reduced anxiety along with better attention and alertness.

From Science Daily • May 3, 2026

Lacey says, “Is it that weird feeling you get from so much caffeine that, like, your heart isn’t beating so much as your whole body is beating?”

From "Paper Towns" by John Green