- The definition of incontrovertible is something that is definitely true and that cannot be denied or disproved.
When scientists show clear, provable, solid evidence that the world is round, the evidence they present is an example of something that would be described as incontrovertible.
- in·con′tro·vert′i·bil′i·ty, in·con′tro·vert′i·ble·ness
(comparative more incontrovertible, superlative most incontrovertible)
in- + controvertible