card games\n\n &the numeral 1 is designated ace and marked A accordingly. In games based on the superiority of one rank over another, such as most trick-taking games, the ace counts highest, outranking even the king. In games based on numerical value, the ace normally counts 1, as in cribbage, or 11, &

Ace high  is simply a type of high card hand . It is the strongest high card hand, followed by King-high, Queen-high etc etc. The term can also be used to indicate that a flush or straight has an Ace has its highest contributing card: the Ace high flush, the Ace high straight.