/ Dictionary / Index B backache: Meaning and Definition of Find definitions for: back•ache Pronunciation: (bak'āk"), [key] — n. a pain, esp. in the lumbar region of the back, usually caused by the strain of a muscle or ligament. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: backache (Thesaurus) back back-alley 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