concentration - definition and synonyms


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  1. 1
    [uncountable] the process of giving all your attention to something

    It took all his concentration to stay awake.

    lose concentration:

    She lost concentration for a moment and slipped.

    a lapse of concentration (=a short period when you do not concentrate):

    He had a little lapse of concentration and lost the game.

  2. 2
    [countable/uncountable] a large number of people or things in one area or a large amount of a particular thing

    large concentrations of Christians in this part of the city

  3. 3
    [countable/uncountable] science the amount of a substance that is present in something

    An investigation found high concentrations of cancer-causing chemicals on the property.