(noun, adjective)


1. of or relating to or producing normal tone or tonus in muscles or tissue

- a tonic reflex

- tonic muscle contraction

2. employing variations in pitch to distinguish meanings of otherwise similar words

Similar word(s): tonal

3. (used of syllables) bearing the principle stress, usually accompanied by a change in pitch

- a tonic syllables carries the main stress in a word

Similar word(s): accented

4. relating to or being the keynote of a major or minor scale

- tonic harmony

Similar word(s): tonal

5. imparting vitality and energy

Similar word(s): invigorating, bracing, brisk, fresh, refreshful, refreshing

Sentences with tonic as an adjective:

- The arrival of the new members had a tonic effect on the team.


1. lime- or lemon-flavored carbonated water containing quinine

Definition categories: food

2. a sweet drink containing carbonated water and flavoring

- in New England they call sodas tonics

Similar word(s): pop, soda

Definition categories: food

3. (music) the first note of a diatonic scale

Similar word(s): keynote

Definition categories: communication, note, tone

4. a medicine that strengthens and invigorates

Similar word(s): restorative

Definition categories: man–made, medicament, medication, medicine

Sentences with tonic as a noun:

- We used to brew a tonic from a particular kind of root.