Thesaurus.com
Dictionary.com
Showing results for caffeine. Search instead for coffeins.
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.

The researchers plan to continue investigating how caffeine influences memory consolidation and memory retrieval.

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

He was like an angry machine, shaking as if he’d just eaten those caffeine pills my mother used to take to stay skinny.

From "Please Ignore Vera Dietz" by A.S. King




Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "caffeine" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com