Definitions

caffeine

[ka-feen, kaf-een, kaf-ee-in] / kæˈfin, ˈkæf in, ˈkæf i ɪn /

NOUN

coffee

Synonyms

STRONGEST

cappuccino espresso

STRONG

brew decaf decoction demitasse ink java mocha mud perk

WEAK

battery acid café café au lait café noir forty weight hot stuff jamocha joe varnish remover

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.

Caffeine levels in the bloodstream usually peak between 30 minutes and two hours after drinking coffee.

From Science Daily • May 18, 2026

Caffeine was also associated with a lower risk of inflammation.

From Science Daily • May 3, 2026

Caffeine has a time dilation on it so it could be hours that I’m in there or 30 minutes.

From Los Angeles Times • Aug. 21, 2025

Caffeine is found in many drinks and some foods, so it is important to check how much you are consuming.

From BBC • Jul. 31, 2025

“My dad can’t drink coffee anymore. Caffeine raises his blood pressure, and the church congregation does enough of that. The drama people bring to his office.”

From "The Manifestor Prophecy" by Angie Thomas

caffeine

Example Sentences

Related Words