definitively
/dɪˈfɪnɪtɪvli/ adverb C2- In a way that is not only decisive, but also conclusive and final.
From the library
Within a year, Penguin had sold over three million copies, proving definitively that a voracious appetite for quality literature existed among the general populace.
Americans definitively embraced the personal automobile as the ultimate symbol of independence, solidifying a cultural attachment that remains incredibly potent today.
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