BRUXISM Meaning of BRUXISM in English [ 'brʌksɪz(ə)m ]■ noun Medicine involuntary habitual grinding of the teeth, typically during sleep.Origin1930s: from Gk brukhein 'gnash the teeth' + -ism . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004