adj. Not capable of being denied, challenged, or disputed; closed to questioning.
the GNU version of the Collaborative International Dictionary of English
adj. Not controvertible; too clear or certain to admit of dispute; indisputable.
The Century Dictionary and Cyclopedia
Not controvertible; too clear or certain to admit of dispute or controversy.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. necessarily or demonstrably true
adj. impossible to deny or disprove
Word Usage
"On the plus side, Mr. Bloomberg said he is most proud of what he called the "incontrovertible evidence" that public schools improved during his tenure."