deafening Play adjective(of a noise) so loud as to make it impossible to hear anything else. SYNONYMS almightyblaringboomingcarryingdinningear-piercingear-shatteringear-splittingechoingextremely noisymightyoverpoweringoverwhelmingresonantresoundingreverberantreverberatingringingroaringthunderingthunderoustremendoustumultuousvery loud