/ Dictionary / Index U ultralight: Meaning and Definition of Find definitions for: ul•tra•light Pronunciation: (adj.ul"tru-līt', ul'tru-līt"n.ul'tru-līt"), [key] — adj. extremely lightweight in comparison with others of its kind: a car with an ultralight engine. —n. something that is ultralight. a small, light, inexpensive single-seat airplane that is essentially a motorized hang glider. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ultraliberal ultramafic Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language