The definition of Arrhenius base isBy akroyclasses.com / Q):- The definition of Arrhenius base is the compound that contains hydroxide and dissolve in water to formOH–a compound that is proton donora compound that is proton acceptera compound that contains a hydrogen atom and dissolve in water to form a hydrogen ionsH+ Ans :- the compound that contains hydroxide and dissolve in water to formOH– for more chemistry visit here and for video lecture visit here