A surrender without conditions, except for those provided by international law.(noun)
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Use "unconditional surrender" in a sentence
"I presume you are as fully informed as we are of the fact of our unconditional surrender of everything east of Alabama and of the total death of any thing like Confederate Authority on this side of the Mississippi river."
"As they rode down together to Doncheroy he and Moltke had agreed that no terms could be offered except the unconditional surrender of the whole army, the officers alone being allowed to retain their swords."