The American Heritage® Dictionary of the English Language, 4th Edition
n. An object of obsessive, usually exaggerated fear or anxiety: "Boredom, laziness and failure . . . These bugaboos, magnified by imagination, keep [the workaholic] running” ( Dun's Review).
n. A recurring or persistent problem: "the bugaboos that have plagued vision systems: high price and slow throughput” ( Lawrence A. Goshorn).
the GNU version of the Collaborative International Dictionary of English
n. Something frightful, as a specter; anything imaginary that causes needless fright; something used to excite needless fear; also, something really dangerous, or an imaginary monster, used to frighten children, etc.
n. a source of concern.
The Century Dictionary and Cyclopedia
n. A bugbear; a bogy; a vain terror; something to frighten a child.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a source of concern
n. an imaginary monster used to frighten children
Word Usage
"My main bugaboo is Labour's obession with non essential NHS staff-I know of a mental health trust that has a communications staff of 10 - and I have no doubt that this is also true throughout the country."