(noun) a medicine that strengthens and invigorates

(noun) (music) the first note of a diatonic scale

(noun) a sweet drink containing carbonated water and flavoring; "in New England they call sodas tonics"

(noun) lime- or lemon-flavored carbonated water containing quinine

(adjective satellite) imparting vitality and energy; "the bracing mountain air"

(adjective) used of syllables; "a tonic syllables carries the main stress in a word"

(adjective satellite) relating to or being the keynote of a major or minor scale; "tonic harmony"

(adjective) employing variations in pitch to distinguish meanings of otherwise similar words; "Chinese is a tonal language"

(adjective) of or relating to or producing normal tone or tonus in muscles or tissue; "a tonic reflex"; "tonic muscle contraction"

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