Synonyms for Conclusively:

adv.

absolutely (adverb)
positively, unconditionally, certainly, utterly, absolutely, Consummately, unequivocally, surely, completely, unqualifiedly, indubitably, categorically, supremely, definitely, unrestrictedly, perfectly.
all (adverb)
once and for all.
entirely (adverb)
exhaustively, holistically, sweepingly, globally, totally, entirely, wholly, fully, comprehensively.
finally (adverb)
finally, positively, lastly, decisively, once and for all.

adv

absolutely (adverb)
completely, categorically, unconditionally, unequivocally, indubitably, supremely, absolutely, Consummately, perfectly, surely, unqualifiedly, positively, definitely, certainly, unrestrictedly, utterly, decisively.
beyond any doubt (adverb)
finally.
completely (adverb)
comprehensively.
entirely (adverb)
sweepingly, holistically, comprehensively, exhaustively, globally, fully, wholly, totally, completely, entirely.
finally (adverb)
finally, once and for all, lastly, decisively.
without doubt (adverb)
surely.

n.

conclusively (noun)
once and for all.
in conclusion (noun)
last, start.

Other synonyms:

in conclusion
last.
Other relevant words:
last, once and for all.

Usage examples for conclusively

  1. The possibility, however, of this last supposition generally admits of being conclusively tested by other experiments. – A System Of Logic, Ratiocinative And Inductive (Vol. 1 of 2) by John Stuart Mill
  2. " One thing seems pretty clear," said George, conclusively and that is, that my brother Phil isn't to be got off the premises except by some very deep move. – Charlotte's Inheritance by M. E. Braddon
  3. As bearing conclusively against those who would assign to him a far later date, viz. – Christology of the Old Testament: And a Commentary on the Messianic Predictions, v. 1 by Ernst Wilhelm Hengstenberg