bugn.[OE. bugge, fr. W. bwg, bwgan, hobgoblin, scarecrow, bugbear. Cf. Bogey, Boggle.]1. A bugbear; anything which terrifies.()Sir, spare your threats:
The bug which you would fright me with I seek. (Shak.)2. (Zol.) A general name applied to various insects belonging to the Hemiptera; as, the squash bug; the chinch bug, etc.()3. (Zol.) An insect of the genus Cimex, especially the bedbug (Cimex lectularius). See Bedbug.()4. (Zol.) One of various species of Coleoptera; as, the ladybug; potato bug, etc.; loosely, any beetle.()5. (Zol.) One of certain kinds of Crustacea; as, the sow bug; pill bug; bait bug; salve bug, etc.()()6. (Computers) An error in the coding of a computer program, especially one causing the program to malfunction or fail. See, for example, year 2000 bug.()7. Any unexpected defect or flaw, such as in a machine or a plan.()8. A hidden electronic listening device, used to hear or record conversations surreptitiously.()9. An infectious microorganism; a germ{4}.()10. An undiagnosed illness, usually mild, believed to be caused by an infectious organism.()11. An enthusiast; -- used mostly in combination, as a camera bug.()Bait bug. See under Bait. -- Bug word, swaggering or threatening language. [Obs.] Beau. & Fl.()v. t. to annoy; to bother or pester.()n.[See Bug.] 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.(Lloyd.)But, to the world no bugbear is so great
As want of figure and a small estate. (Pope.)The bugaboo of the liberals is the church pray. (S. B. Griffin.)The great bugaboo of the birds is the owl. (J. Burroughs.)2. a source of concern; as, the old bugaboo of inflation still bothers them.()()