/ Dictionary / Index U ULCC: Meaning and Definition of Find definitions for: ULCC Pronunciation: [key] a supertanker with a deadweight capacity of over 250,000 tons. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ulbricht ulcer Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language