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definitively Synonyms
Another word for definitively
Choosing another word for definitively that fits your sentence is easier when synonyms and similar words are paired with an exact adverb definition and ranked by match strength.
• adverb (Context 1)
In a decisive, conclusive, or authoritative manner that settles an issue finally and leaves no room for doubt.
Usage Example
"The laboratory results conclusively proved that the water supply had not been contaminated."
Strongest
conclusively
decisively
once and for all
Strong
authoritatively
finally
irrevocably
unquestionably
incontrovertibly
Opposites of definitively
The opposite of definitively shifts depending on context. Common opposites include:
inconclusively
tentatively
provisionally
indecisively
ambiguously
temporarily
• Nearby Words
Cite this Entry
Wordmom. (2026). Synonyms for Definitively. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/definitively