/ Dictionary / Index L longitude by account: Meaning and Definition of Find definitions for: lon'gitude by account' Pronunciation: [key] — Navig. Navig. the longitude of the position of a vessel as estimated by dead reckoning. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. longitude longitudinal Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language