American Heritage Dictionary of the English Language, 5th Edition
Middle English, alteration of uttermest
Uttermost Sentence Examples
Ferdinand drove to the uttermost the advantages of his victory.
Every day in imagination I made a trip round the world, and I saw many wonders from the uttermost parts of the earth--marvels of invention, treasuries of industry and skill and all the activities of human life actually passed under my finger tips.
The administrative duties connected with the army of occupation would alone have taxed to the uttermost the powers of an ordinary man.