*mass¹/mæs; mæs/ n 1 [C] a large amount of something 团; 块; 堆: a mass of dark clouds 一团乌云 2 massesBrE informal a large number or amount of something 【英,非正式】 许多,大量: I've got masses of homework. 我有许多家庭作业要做。 3 the masses all the ordinary people in a society 群众,平民 4 [U] technical the amount of physical material in something 【术语】 质量: the mass of a star 一颗星的质量