definitively

Once and for all

Definitively means in a way that settles a matter conclusively, leaving no room for doubt or further debate: The study definitively proved the link between smoking and cancer.

It implies finality and authority—a definitive answer ends the question.

Distinguished from definitely, which simply means certainly or without doubt.

certainty

conclusively

In a final, undeniable manner

irrefutably · undeniably · categorically · unmistakably · absolutely · decisively · beyond doubt · without question · authoritatively · finally

resolution

conclusively

In a final, undeniable manner

once and for all · settled · resolved · determined · ended · completed · finished · closed · wrapped up · done

authoritative

officially

With authorized sanction

comprehensively · exhaustively · thoroughly · scholarly · rigorously · expertly · academically · professionally · systematically · meticulously

Opposites
conclusiveness

definitivelyinconclusively

Without definite result

tentatively · provisionally · preliminarily · incompletely · open-endedly

precision/exactness

definitivelyvaguely

In unclear fashion

inexactly · ambiguously · uncertainly · approximately · imprecisely

confidence/assertiveness

definitivelytentatively

Without full commitment

uncertainly · doubtfully · hesitantly · equivocally · haltingly

Phrases
Family

definitive, definitiveness

Familiarity
Top 100,000
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Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G