implied acquittal

noun

: an acquittal of a more serious offense (as first-degree murder) that is considered to result from a verdict which convicts the defendant of a lesser included offense while remaining silent on the greater one

Note: A greater offense and a lesser included offense are the same offense under a double jeopardy analysis. Therefore, a conviction of a lesser included offense and implied acquittal of the greater offense bars retrial on the greater offense.