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Definition of 'mass'


  1. the property of a body that causes it to have weight in a gravitational field
  2. (often followed by `of') a large number or amount or extent; "a batch of letters"; "a deal of trouble"; "a lot of money"; "he made a mint on the stock market"; "it must have cost plenty"
       Synonyms: batch deal flock good deal great deal hatful heap lot mess mickle mint muckle peck pile plenty pot quite a little raft sight slew spate stack tidy sum wad whole lot whole slew
  3. an ill-structured collection of similar things (objects or people)
  4. (Roman Catholic Church and Protestant Churches) the celebration of the Eucharist
  5. a body of matter without definite shape; "a huge ice mass"
  6. the common people generally; "separate the warriors from the mass"; "power to the people"
       Synonyms: multitude masses hoi polloi people the great unwashed
  7. the property of something that is great in magnitude; "it is cheaper to buy it in bulk"; "he received a mass of correspondence"; "the volume of exports"
       Synonyms: bulk volume
  8. a musical setting for a Mass; "they played a Mass composed by Beethoven"
  9. a sequence of prayers constituting the Christian Eucharistic rite; "the priest said Mass"


  1. join together into a mass or collect or form a mass; "Crowds were massing outside the palace"


  1. gathered or tending to gather into a mass or whole; "aggregate expenses include expenses of all divisions combined for the entire year"; "the aggregated amount of indebtedness"
       Synonyms: aggregate aggregated aggregative

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