- The definition of indubitable is something that is true without question or that is absolutely true beyond doubt.
An example of something that would be described as indubitable is the fact that the world is round.
Origin: L indubitabilis: see in- and amp; dubitable
- indubitably adverb
Used by arrangement with John Wiley & Sons, Inc.
- in·duˈbi·ta·bly adverb