Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “tonic”


noun [C]    /ˈtɑn·ɪk/
a liquid medicine intended to make you feel better generally rather than treating a particular health problem A tonic is also anything that makes you feel better: Seeing his grandchildren was the perfect tonic for him.
(Definition of tonic noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of tonic

More American English definitions for “tonic”

Definitions of “tonic” in other dictionaries

Word of the Day


When a boat or a ship sails, it travels on the water.

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More