Simple Definition of incontestable
: not able to be doubted or questioned
Examples of incontestable in a sentence
The evidence against him is incontestable.
<the incontestable statement that every contest has a winner and a loser>
Origin and Etymology of incontestable
French, from in- + contestable, from contester to contest
First Known Use: 1673
Seen and Heard
What made you want to look up incontestable? Please tell us where you read or heard it (including the quote, if possible).