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    con·cen·tra·tion
    /ˌkänsənˈtrāSH(ə)n/

    noun

    • 1. the action or power of focusing one's attention or mental effort: "frowning in concentration" Similar close attentionclose thoughtattentivenessapplicationOpposite inattentiondistraction
    • 2. a close gathering of people or things: "the largest concentration of Canada geese on earth" Similar gatheringclustermassflock

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