/ Dictionary / Index L lunar module: Meaning and Definition of Find definitions for: lu'nar mod'ule Pronunciation: [key] — U.S. Aerospace. (often cap.)U.S. Aerospace. the portion of the Apollo spacecraft in which two astronauts landed on the moon's surface and then returned to the orbiting command module. Also calledAbbr.: LM Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lunarian lunar month Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language