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WordNet-Online
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Definitions from WordNet
Noun caffeine has 1 sense
- caffeine, caffein - a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects
--1 is a kind of alkaloid
--1 is a substance of coffee, java; tea
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Definitions from the Web
Caffeine
Definition: Caffeine is a natural stimulant commonly found in coffee, tea, cacao, and various other plants. It belongs to the methylxanthine class of compounds and acts as a central nervous system stimulant, temporarily warding off drowsiness and restoring alertness.
Examples of Usage:
Noun:
- The energy drink contained high levels of caffeine.
- Doctors recommend limiting caffeine intake during pregnancy.
Adjective:
- The café offers a wide selection of caffeinated beverages.
- She preferred decaffeinated tea over the caffeinated version.
Verb:
- He often caffeine-induced his late nights with espresso shots.
- They caffeinated themselves before the long road trip.
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