Breadcrumb Home > Dictionary > Index N nullo: Meaning and Definition of Find definitions for: nul•lo Pronunciation: (nul'ō), [key] — pl. -los. (in certain card games) a bid to take no tricks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. null method null sequence ✖ Related Content Daily Word Quiz: unctuous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language