n.

1. 团，块，堆，片，群
2. 众多；大量，大宗[S][P][（+of）]
   I've masses of work to do.

   我有许许多多的工作要做。

   There was a mass of children in the yard.

   院子里有一大群孩子。

3. 大部分，主要部分[the S]
   The mass of public opinion is in favor of the new foreign policy.

   大部分的舆论拥护新的外交政策。

4. 大众，民众[the p]
   I wonder if they are truly concerned with the interests of the masses.

   我不知道他们是否真正关心民众的利益。

5. 【物】质量[U]
   A liter of gas has less mass than a liter of water.

   一公升汽油的质量比一公升水的质量小。

a.[Z][B]

1. 大众的，民众的
   Mass education is essential in promoting democracy.

   民众教育对提倡民主是非常重要的。

2. 大量的；大规模的；大批的
   We want to promote literacy on a mass scale.

   我们要大规模地提高文化水平。

3. 整个的，全部的

vi.

1. 聚集起来
   Dark clouds massed and we expected rain.

   乌云密布，看起来就要下雨了。

vt.

1. 集中，聚集

n.

1. a coherent body of matter with no definite shape.
   ▸any of the main portions in a painting that each have some unity in colour, lighting, etc.
2. a large number of people or objects gathered together:
   a mass of cyclists.
   ▸a large amount of material.
3. (the mass of) the majority of.
   ▸ (the masses) the ordinary people.
4. Physics  the quantity of matter which a body contains, as measured by its acceleration under a given force or by the force exerted on it by a gravitational field.
   ▸(in general use) weight.

adj.

v.