/ Dictionary / Index L lung: Meaning and Definition of Find definitions for: lung Pronunciation: (lung), [key] — n. either of the two saclike respiratory organs in the thorax of humans and the higher vertebrates. an analogous organ in certain invertebrates, as arachnids or terrestrial gastropods. as loudly as possible; with full voice: The baby cried at the top of his lungs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lung (Thesaurus) Lunéville lungan Related Content Daily Word Quiz: menagerie Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language