BARM Meaning of BARM in English /bahrm/ , n.yeast formed on malt liquors while fermenting. [ bef. 1000; ME berme, OE beorma; c. Fris berme, G Bärme, Sw bärme; akin to FERMENT ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012