The greatest amount or degree possible; the utmost.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "uttermost" in a sentence
"But then one day in uttermost space thousands of innocents are killed — victims of a military error — and the deadly balance is upset."
"What the tribesman resents to the uttermost is not the administration of law, but the attempt to force on him laws to which he has never assented."
"You do not deny yourself; you believe that self-assertion to the uttermost is the prime duty. ""