The highest rank attainable in the British Army is that of Field Marshal. There are currently seven living Field Marshals, the most senior is Baron Richard Vincent of Coleshill of the Royal Artillery.
The highest rank for a skill is 1
The highest ninja rank is kage
The highest rank is Tai Pan
The black belt is the highest rank in martial arts.
The highest rank in Halo: Reach is Inheritor.
The highest rank you can reach is 46.
Domain is the highest rank in taxonomic classification.
Baiji - Baiji is the highest rank you can reach in sumdog, it's the 31st rank in sumdog.
The highest rank currently known in Platform Racing 2 is UnknownAx with a rank of 60, and he is tied with quesin, but UnknownAx hacked.
highest rank in the world is : SECRETARY GENERAL OF UNITED NATION
Reichsführer-SS. That was the highest rank in the SS which was reserved for him.
Guildmaster rank after you obtain secret rank from rescuing sicior. This is after you defeat primal dialga and graduate from the guild. The highest rank before the end of the game is master rank.