1mass 
/ˈmæs/ noun
plural mass·es /ˈmæs/ noun 1 [count] : a usually large amount of a substance that has no particular shape
▪ The slush froze into an icy mass. ▪ a cold air mass ▪ rock masses — often + of ▪ a mass of metal/clay/dough ▪ masses of floating ice — see also body mass index, critical mass, landmass 2 a [count] : a large number or amount of something
▪ The plant produces a (great/large/huge) mass of blossoms every spring. = The plant produces masses of blossoms every spring. ▪ a mass of data/information
b [count] : a large number of people
▪ A great mass of voters turned out for the election. ▪ The team was greeted by a mass [=crowd] of fans. ▪ The war has forced masses of people to flee their homes.
c masses [plural] Brit, informal : a large amount of something
▪ Don't worry: we've still got masses [=lots] of time. 3 the masses : the ordinary or common people
▪ His films are not intended to appeal to the masses. ▪ the needs of the masses ▪ a politician who is popular with the masses ▪ trying to reach the masses 4 [noncount] physics : the quantity of matter in something
▪ a star's mass
▪ The slush froze into an icy mass. ▪ a cold air mass ▪ rock masses — often + of ▪ a mass of metal/clay/dough ▪ masses of floating ice — see also body mass index, critical mass, landmass
▪ The plant produces a (great/large/huge) mass of blossoms every spring. = The plant produces masses of blossoms every spring. ▪ a mass of data/information
b [count] : a large number of people
▪ A great mass of voters turned out for the election. ▪ The team was greeted by a mass [=crowd] of fans. ▪ The war has forced masses of people to flee their homes.
c masses [plural] Brit, informal : a large amount of something
▪ Don't worry: we've still got masses [=lots] of time.
▪ His films are not intended to appeal to the masses. ▪ the needs of the masses ▪ a politician who is popular with the masses ▪ trying to reach the masses
▪ a star's mass
the mass of
: the main part of (something)
▪ The mass of the iceberg [=the largest part of the iceberg] is below the surface of the water. ▪ His policies are supported by the (great/broad) mass of the people. [=by most of the people]
▪ The mass of the iceberg [=the largest part of the iceberg] is below the surface of the water. ▪ His policies are supported by the (great/broad) mass of the people. [=by most of the people]
