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Webster 1828 Edition

Adj.

Not contestable; not to be disputed; not admitting debate; too clear to be controverted; incontrovertible; as incontestable evidence, truth or facts.

incontestable

Not contestable; indisputable; certain; incontrovertible.
That he was the greatest 100m runner of his generation was incontestable.

incontestable m, f ‎(plural incontestables)

incontestable m, f ‎(plural incontestables)