caffeine

noun
UK: /ˈkafɪn/
US: /kæˈfiːn/

  1. A chemical, found especially in coffee and tea, that makes you feel more awake.

    1. I need caffeine to wake up in the morning because I feel sleepy.
    2. Many people rely on caffeine to help them stay alert during long workdays

  2. A stimulant drug that occurs naturally in tea, coffee, and cacao plants.

    1. This soda has a lot of caffeine, so I don't drink it often.
    2. Excessive caffeine intake can lead to insomnia and increased heart rate sometimes.

Synonyms

stimulant upper
caffeine transitive-verb

  1. To add caffeine to something or to stimulate with caffeine.

    1. I caffeinate my morning with a strong cup of coffee always.
    2. The energy drink is designed to caffeinate you quickly for a short term.

Frequently Asked Questions

The word "caffeine" in English means: A chemical, found especially in coffee and tea, that makes you feel more awake., A stimulant drug that occurs naturally in tea, coffee, and cacao plants..

The phonetic transcription of "caffeine" is /ˈkafɪn/ in British English and /kæˈfiːn/ in American English. Click the 🔊 button to hear both pronunciations.

Synonyms for "caffeine": stimulant, upper.

Example usage of "caffeine": "I need caffeine to wake up in the morning because I feel sleepy.". More examples on the page.