the quantity of the utmost tensile, compressive, or shearing stress that a given unit area of a certain material is expected to bear without failing.
Also called ultimate stress.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for ultimate strength
the maximum tensile stress that a material can withstand before rupture
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012