/ Dictionary / Index U upsetting lever: Meaning and Definition of Find definitions for: upset'ting lev"er Pronunciation: [key] — Naval Archit. Naval Archit. the horizontal distance between the center of gravity, acting downward, and the center of buoyancy, acting upward, when they are so placed as to form a couple tending to capsize the boat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. upsetting upsetting moment Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language