/ Dictionary / Index L lab: Meaning and Definition of Find definitions for: lab Pronunciation: (lab), [key] — n. laboratory. Lab Pronunciation: (lab), [key] — n. See Lab. Pronunciation: [key] Laborite. Labrador. lab. Pronunciation: [key] labor. laboratory. laborer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lab (Thesaurus) Laaland La Baie Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language