| noun | lime- or lemon-flavored carbonated water containing quinine |
| noun | a sweet drink containing carbonated water and flavoring “in New England they call sodas tonics” |
| noun | (music) the first note of a diatonic scale |
| noun | a medicine that strengthens and invigorates |
| adjective | of or relating to or producing normal tone or tonus in muscles or tissue “a tonic reflex” |
| adjective | employing variations in pitch to distinguish meanings of otherwise similar words “Chinese is a tonal language” |
| adjective | used of syllables “a tonic syllables carries the main stress in a word” |
| adjective | relating to or being the keynote of a major or minor scale “tonic harmony” |
| adjective | imparting vitality and energy “the bracing mountain air” |
| restorative | adjective | tending to impart new life and vigor to |
| tone | noun | the elastic tension of living muscles, arteries, etc. that facilitate response to stimuli |
| tonicity | noun | the elastic tension of living muscles, arteries, etc. that facilitate response to stimuli |
| freshness | noun | the property of being pure and fresh (as if newly made); not stale or deteriorated |