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  1. come into operation

    • begin functioning or having effect
    • begin functioning or having effect
    • cause something to begin functioning or having effect
    • cease functioning or having effect
    • cease functioning or having effect
    • cause something to begin functioning or having effect
    • begin (or cease) functioning or having effect
    • plural

      covert military or political operations that may employ measures not generally authorized:
    • noun

      the application of scientific principles to business management, providing a quantitative basis for complex decisions.
    • noun

      a person in charge of the planning and execution of the routine functions and activities of an organization:
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