Definition of original gravity in English:

original gravity


  • [mass noun] The relative density of the wort before it is fermented to produce beer, being chiefly dependent on the quantity of fermentable sugars in solution. It is regarded as a guide to the alcoholic strength of the finished beer.

    • ‘Take your original gravity reading before the yeast is pitched after brewing.’
    • ‘The specific gravity of beer measured before fermentation is called its original gravity.’