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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.

They said that caffeine could affect the results, and gel interferes with the electrodes.

From The Wall Street Journal • Jun. 27, 2026

Many contain large amounts of caffeine, which stimulates the central nervous system and makes you feel more awake.

From BBC • Jun. 22, 2026

But caffeine is a double-edged sword because the stimulant lingers in the body for a long time – a strong coffee at kick-off could be a disaster for sleep.

From BBC • Jun. 13, 2026

Nur House Cafe — If you’re in need of a caffeine break and something sweet, make time for Nur House Cafe.

From Salon • Jun. 11, 2026

She needed some caffeine in her system before she called home to tell her parents she’d arrived.

From "When Dimple Met Rishi" by Sandhya Menon




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