- Not contestable; not to be disputed; that cannot be
called in question or controverted; incontrovertible; indisputable; as,
incontestable evidence, truth, or facts.
Meaning of 'incontestable' (Princeton's WordNet)
1 . incontestable
[ s]
Meaning (1): - not open to question; obviously true
Incontestable clause Incontestable clause is a contractual provision in a life insurance policy stating that the insurer cannot contest the policy after it has been in force two years