Meaning of tonic

Definition of tonic

(adj) of or relating to or producing normal tone or tonus in muscles or tissue; "a tonic reflex"; "tonic muscle contraction"
employing variations in pitch to distinguish meanings of otherwise similar words; "Chinese is a tonal language"
(used of syllables) bearing the principle stress, usually accompanied by a change in pitch; "a tonic syllables carries the main stress in a word"
relating to or being the keynote of a major or minor scale; "tonic harmony"
imparting vitality and energy; "the bracing mountain air"
(noun) lime- or lemon-flavored carbonated water containing quinine
a sweet drink containing carbonated water and flavoring; "in New England they call sodas tonics"
(music) the first note of a diatonic scale
a medicine that strengthens and invigorates

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