ut'-er-most: A pleonastic compound of a comparative ("utter"; compare "outer") and a superlative ("most"), in the King James Version used interchangeably with the ordinary superlative forms "utmost" (compare Mt 12:42; Lu 11:31) and "outmost" (compare Ex 26:4,10). The Revised Version (British and American) adds still another form, "outermost," in 2Ki 7:5,8 (the King James Version "uttermost"). the Revised Version (British and American) has made a few changes to secure a more accurate translation (Jer 9:26; Joe 2:20, etc.) or to give uniformity (Ex 26:4; Mt 5:26; 12:42, etc.), but for the most part has left the King James Version undisturbed.
The International Standard Bible Encyclopedia
Uttermost
The International Standard Bible Encyclopedia, James Orr (1915). Public domain, from the CrossWire SWORD module.