What Is A Mantra? A Mantra is a sound or a word that is being repeated frequently in mind or out loud that results in silencing the constant noise and chatter of your thoughts. The word Mantra in Sanskrit means, ‘man’ pertaining to mind and the ‘tra’, or instruments, which makes mantra a “mind’s instrument.” The sound of ‘tra’ also means ‘free’. Therefore, a mantra is a tool that helps in freeing the mind from all negative state. Get all the info you need here.