/ Dictionary / Index L lack: Meaning and Definition of Find definitions for: lack Pronunciation: (lak), [key] — n. deficiency or absence of something needed, desirable, or customary: lack of money; lack of skill. something missing or needed: After he left, they really felt the lack. —v.t. to be without or deficient in: to lack ability; to lack the necessities of life. to fall short in respect of: He lacks three votes to win. —v.i. to be absent or missing, as something needed or desirable: Three votes are lacking to make a majority. to be short of or deficient in: What he lacks in brains, he makes up for in brawn. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lack (Thesaurus) lac insect lackadaisical Related Content Daily Word Quiz: inane Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language