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Bug  (bg, bk)
1. also Western Bug A river of eastern Europe rising in southwest Ukraine and flowing about 772 km (480 mi) through Poland to the Vistula River near Warsaw.
2. also Southern Bug A river of southern Ukraine rising in the southwest part and flowing about 853 km (530 mi) generally southeast to the Black Sea.

bug  (bg)
1. A true bug.
2. An insect or similar organism, such as a centipede or an earwig. See Regional Note at lightning bug.
a. A disease-producing microorganism: a flu bug.
b. The illness or disease so produced: stomach flu, a cold, or just some bug going around (David Smollar).
a. A defect or difficulty, as in a system or design.
b. Computer Science A defect in the code or routine of a program.
5. An enthusiasm or obsession: got bitten by the writing bug.
6. An enthusiast or devotee; a buff: a model train bug.
7. An electronic listening device, such as a hidden microphone or wiretap, used in surveillance: planted a bug in the suspects room.
v. bugged, bug·ging, bugs
To grow large; bulge: My eyes bugged when I saw the mess.
a. To annoy; pester.
b. To prey on; worry: a memory that bugged me for years.
2. To equip (a room or telephone circuit, for example) with a concealed electronic listening device.
3. To make (the eyes) bulge or grow large.
Phrasal Verbs:
bug off Slang
To leave someone alone; go away.
bug out Slang
1. To leave or quit, usually in a hurry.
2. To avoid a responsibility or duty. Often used with on or of: bugged out on his partners at the first sign of trouble.
put a bug in (someones) ear Informal
To impart useful information to (another) in a subtle, discreet way.

[Origin unknown.]

bugger n.

Bug (Russian) [buk]
1. (Placename) Also called Southern Bug a river in E Europe, rising in the W Ukraine and flowing southeast to the Dnieper estuary and the Black Sea. Length: 853 km (530 miles)
2. (Placename) Also called Western Bug a river in E Europe, rising in the SW Ukraine and flowing northwest to the River Vistula in Poland, forming part of the border between Poland and the Ukraine. Length: 724 km (450 miles)

1. (Life Sciences & Allied Applications / Animals) any insect of the order Hemiptera, esp any of the suborder Heteroptera, having piercing and sucking mouthparts specialized as a beak (rostrum) See also assassin bug, bedbug, chinch bug
2. (Life Sciences & Allied Applications / Zoology) Chiefly US and Canadian any insect, such as the June bug or the Croton bug
3. (Life Sciences & Allied Applications / Microbiology) Informal
a.  a microorganism, esp a bacterium, that produces disease
b.  a disease, esp a stomach infection, caused by a microorganism
4. Informal an obsessive idea, hobby, etc.; craze (esp in the phrases get the bug, be bitten by the bug, the bug bites, etc.)
5. Informal a person having such a craze; enthusiast
6. (Electronics & Computer Science / Computer Science) (often plural) Informal an error or fault, as in a machine or system, esp in a computer or computer program
7. Informal a concealed microphone used for recording conversations, as in spying
8. (Group Games / Card Games) US (in poker) a joker used as an ace or wild card to complete a straight or flush
vb bugs, bugging, bugged Informal
1. (tr) to irritate; bother
2. (tr) to conceal a microphone in (a room, etc.)
3. (Life Sciences & Allied Applications / Anatomy) (intr) US (of eyes) to protrude See also bug out
[of uncertain origin; perhaps related to Old English budda beetle]

(Myth & Legend / European Myth & Legend) Obsolete an evil spirit or spectre; hobgoblin
[C14 bugge, perhaps from Middle Welsh bwg ghost. See also bugbear, bugaboo]

a past tense and past participle of big2

bug  (bg)
1. An insect belonging to the suborder Heteroptera. See more at true bug.
2. An insect, spider, or similar organism. Not in scientific use.
Usage The word bug is often used to refer to tiny creatures that crawl along, such as insects and even small animals that are not insects, such as spiders and millipedes. But for scientists the word has a much narrower meaning. In the strictest terms bugs are those insects that have mouthparts adapted for piercing and sucking. The mouthparts of these bugs are contained in a beak-shaped structure. Thus scientists would classify a louse but not a beetle or a cockroach as a bug. In fact, scientists often call lice and their relatives true bugs to distinguish them better from what everyone else calls bugs.

bug  /bg/  n. 1 an insect: There are bugs in that dirty kitchen. 2 infrml.fig. a tiny organism that causes diseases, (syn.) a germ: Im sick; Ive caught a flu bug. 3 fig. a hidden listening device: The spy hid a bug in the lamp. 4 fig. a fault in an electrical or mechanical device or system: My computer program has a bug in it; every time I type n, it goes to the bottom of the page. 5 infrml.fig. an interest, fad: the travel bug
v. bugged, bugging, bugs 1 infrml. [T] to annoy: His boss keeps bugging him to work faster. 2 fig. [T] to use a listening device, (syn.) to eavesdrop: Police bugged the criminals telephone. 3 phrasal v. [I] to bug off: to leave, go away: Bug off! You annoy me! 4 phrasal v. [I] to bug out: to leave quickly: As the police arrived, the thief bugged out. 5 infrml. a bug in s.o.s ear: a suggestion bug

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