/ Dictionary / Index B bugaboo: Meaning and Definition of Find definitions for: bug•a•boo Pronunciation: (bug'u-b"), [key] — pl. -boos. something that causes fear or worry; bugbear; bogy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bugaboo (Thesaurus) bug bugaku Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language