Adverb: indubitably in'dyoo-bi-tu-blee
- In a manner or to a degree that could not be doubted
"it was immediately and indubitably apparent that I had interrupted a scene of lovers";
- beyond doubt, beyond a doubt, beyond a shadow of a doubt, without a doubt, indisputably
See also: by all odds, certainly, decidedly, definitely, emphatically, for certain, for sure, in spades [informal], sure, sure as shooting [informal], sure enough, surely, unquestionably