/ Dictionary / Index U ultimate strength: Meaning and Definition of Find definitions for: ul'timate strength' Pronunciation: [key] — Engin. Engin. 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 Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ultimate constituent ultima Thule Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language