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Concentration

ˌkɒn(t)snˈtreɪʃn

Concentration definitions
noun
concentration concentrations
  1. the action or power of focusing all one's attention

    "she was frowning in concentration"

    • dealing with one particular thing above all others

      "concentration on the needs of the young can mean that the elderly are forgotten"

  2. a close gathering of people or things

    "the island has the greatest concentration of seabirds in the north-west"

    • the action of gathering together closely

      "the concentration of power in the hands of nobles"

  3. the relative amount of a particular substance contained within a solution or mixture or in a particular volume of space

    "the gas can collect in dangerous concentrations"

    • the action of strengthening a solution by the removal or reduction of the diluting agent or by the selective accumulation of atoms or molecules

      "by concentration of cell contents and supercooling, frost-hardened plant tissues survive temperatures down to −10°C"