/ Dictionary / Index M marine engineer: Meaning and Definition of Find definitions for: marine' engineer' Pronunciation: [key] an officer who operates, maintains, and repairs the machinery of a ship. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Marine Corps marine engineering Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language