n 1  :  a sound of definite pitch and vibration  2 a  :  the state of a living body or of any of its organs or parts in which the functions are healthy and performed with due vigor  b  :  normal tension or responsiveness to stimuli : specif  :  TONUS 2
, vt, toned  ton*ing  :  to impart tone to <medicine to up the system>  < the muscles>  .
 
 
 
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