1 never having lost, esp. a competition, within a particular period of time:
The Buffaloes upset No. 1-ranked and previously undefeated Wisconsin.
An argument is 'warranted' when the reasoner reaches a stage where for any new stage of reasoning the argument remains undefeated.
Integral to the cultivated ideal of the soldier nation is the country's "undefeated" battle record.
He was undefeated throughout his series of election campaigns.
It is not merely that they are undefeated, but that they appear to be quite undefeatable.
We shall continue while it is necessary with all the vast resources of this undefeated country to arm in defence of our country and peace.
It is true that he was the chief architect of a terrible peace, but nevertheless he left us free and undefeated.
Undaunted, undefeated she was, walking with calmness, power, directness and grace through all the demands of her times and her station.
Would not there be widespread support for such a proposal to provide the funds sorely needed to rid mankind of its last undefeated scourge?
