01 n. A bugbear; anything which terrifies.
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1.
A bugbear; anything which terrifies.[Obs.]“Sir, spare your threats: The bug which you would fright me with I seek.” — Shak.
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2.
A general name applied to various insects belonging to the Hemiptera; as, the squash bug; the chinch bug, etc.(Zool.)
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3.
An insect of the genus Cimex, especially the bedbug (Cimex lectularius). See Bedbug.(Zool.) See: Bedbug
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4.
One of various species of Coleoptera; as, the ladybug; potato bug, etc.; loosely, any beetle.(Zool.)
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5.
One of certain kinds of Crustacea; as, the sow bug; pill bug; bait bug; salve bug, etc.(Zool.)
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6.
An error in the coding of a computer program, especially one causing the program to malfunction or fail. See, for example, year 2000 bug.(Computers) See: year 2000 bug
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7.
Any unexpected defect or flaw, such as in a machine or a plan.
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8.
A hidden electronic listening device, used to hear or record conversations surreptitiously.
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9.
An infectious microorganism; a germ{4}.[Colloq.]
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10.
An undiagnosed illness, usually mild, believed to be caused by an infectious organism.[Colloq.]
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11.
An enthusiast; -- used mostly in combination, as a camera bug.[Colloq.]