Definitions
1.nounAn insect of the order Hemiptera (the “true bugs”).
2.nounAny of various species of marine or freshwater crustaceans; e.g. a Morton Bay bug, mudbug.
3.nounAny insect, arachnid, or other terrestrial arthropod that is a pest."These flies are a bother. I’ll get some bug spray and kill them."
4.nounAny insect, arachnid, myriapod or entognath.
5.noun(chiefly computing and engineering jargon) A problem that needs fixing."The software bug led the computer to calculate 2 plus 2 as 3."
6.nounA contagious illness; a bacterium or virus causing it"He’s got the flu bug."
7.nounAn enthusiasm for something; an obsession"I caught the skiing bug while staying in the Alps."
8.nounA keen enthusiast or hobbyist.
9.nounA concealed electronic eavesdropping or intercept device"We installed a bug in her telephone."
10.nounA small and usually invisible file (traditionally a single-pixel image) on a World Wide Web page, primarily used to track users."He suspected the image was a Web bug used for determining who was visiting the site."
11.nounA small, usually transparent or translucent image placed in a corner of a television program to indicate what network or cable channel is televising it"Channel 4's bug distracted Jim from his favorite show."
12.nounA manually positioned marker in flight instruments.
13.nounA semi-automated telegraph key.
14.nounHobgoblin, scarecrow; anything that terrifies.
15.noun("the bug") HIV.
16.nounA limited form of wild card in some variants of poker.
17.nounA trilobite.
18.nounA young apprentice jockey.
19.verbTo annoy."Don’t bug me, I’m busy!"
20.verbTo install an electronic listening device or devices in."We need to know what’s going on. We’ll bug his house."
21.nounA microfossil, particularly a foraminiferan.