caf‧feine /ˈkæfiːn $ kæˈfiːn/
noun [uncountable][
Date: 1800-1900;
Language: German;
Origin: kaffein, from kaffee 'coffee', from French café]
a substance in tea, coffee, and some other drinks that makes you feel more active ⇒
decaffeinated:
Avoid caffeine (=drinks with caffeine) before bedtime. a caffeine-free cola—caffeinated /ˈkæfəneɪtəd, ˈkæfɪneɪtəd/
adjective [TahlilGaran] Dictionary of Contemporary English ▲