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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.

"We found that caffeine can reverse these disruptions at both the molecular and behavioral levels. Its ability to do so suggests that caffeine's benefits may extend beyond simply helping us stay awake."

From Science Daily • May 30, 2026

The drink's bright emerald colour has attracted the TikTok generation, and the milder caffeine hit from its green tea powder is suited to health-conscious drinkers who want good sleep.

From BBC • May 28, 2026

Their cafes are not designed for seating, but for the rapid delivery of caffeine, ordered by apps.

From BBC • May 28, 2026

As a vehicle for jitters, Diet Coke also contains significantly more caffeine than both regular Coca-Cola and Coke Zero.

From The Wall Street Journal • May 20, 2026

It was getting to the perfect stage of meltiness, where the sugar and caffeine came together in a glorious adrenaline spiral.

From "Far from the Tree" by Robin Benway




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