tonic Definition

1. A medicine that increases strength, energy and the general wellbeing of the body.
2. Anything that is refreshing or invigorating.

Thesaurus: refresher, boost, stimulant, bracer, pick-me-up (slang), shot in the arm (slang).
3. tonic water.
4. music.
The first note of a scale, the note on which a key is based.

1. Increasing strength, energy and wellbeing.
2. Invigorating.
3. music.
Belonging or relating to the tonic scale.
4. Producing tension, especially muscular, tension.

1. A carbonated soft drink flavoured with quinine, usually used as a mixer with alcoholic drinks, especially gin.