- The definition of a bug is an insect or a defect in something.
- An example of bug is a beetle.
- An example of bug is something that keeps a computer program from working correctly.
- Bug is slang meaning to annoy someone.
An example of bug is a child asking their parent if they're there yet over and over again during a long road trip.
A close up of a bug.
bug definition by Webster's New World
- any of an order (Hemiptera) of insects with sucking mouthparts and with forewings thickened toward the base, as a water bug or squash bugalso called true bug
- any small arthropod, esp. if regarded as a pest, as a louse, cockroach, or centipede
- ☆ a defect or imperfection, as in a machine or computer program: somewhat informal when used outside of a computer context
- Informal any microscopic organism, esp. one causing disease; germ or virus
- ☆ Informal a tiny microphone hidden to record conversation secretly
- ☆ Slang
- an enthusiast or devotee: often used in combination: a shutterbug pursues photography as a hobby
- a particular enthusiasm or obsession
- ☆ Slang a small, compact automobile
- Slang the weight allowance (5 pounds, or 2.3 kg) granted to an apprentice jockey for one year after the riding of five winners
Origin: probably ; from bug
- Informal to hide a microphone in (a room, etc.), as for recording a conversation secretly
- to annoy, bother, anger, etc.
- to confuse or puzzle
Origin: Middle English bugge, akin to Norwegian dialect, dialectal bugge: see big
bug definition by American Heritage Dictionary
- A true bug.
- 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.
- An enthusiasm or obsession: got bitten by the writing bug.
- An enthusiast or devotee; a buff: a model train bug.
- An electronic listening device, such as a hidden microphone or wiretap, used in surveillance: planted a bug in the suspect's room.
- a. To annoy; pester.b. To prey on; worry: a memory that bugged me for years.
- To equip (a room or telephone circuit, for example) with a concealed electronic listening device.
- To make (the eyes) bulge or grow large.
Origin: Origin unknown.
- bugˈger noun
- 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.
- 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 - Computer Definition
- An error in coding or logic that causes a computer software program to malfunction (i.e., perform erratically, suffer catastrophic failure (crash), or produce invalid results. Although the origin of the term bug is somewhat in dispute, folklore dates it the mid-to-late 1940s, when a moth attracted to the light given off by the vacuum tubes of one of the first digital computers, either the Mark I or the ENIAC, died and shorted one of the circuits, causing a system failure. Others attribute the term to Thomas Edison (1878). So much for the etymology of bug. As for entomology, a moth is not a bug, strictly speaking. A true bug has thickened forewings and mouth parts adapted for piercing and sucking, and is of the insect order Hemiptera, which includes aphids, cicadas, and squash bugs. Moths suck, but do not pierce, and belong to the order Lepidoptera, as do butterflies. (Note: There are two kinds of people in this world -those who just love this arcane trivia, and those who hate it. I love it, in moderation. "Arcane trivia" is somewhat tautological, which is a pedantic word for redundant. There are two types of people in this world -- those who love pedants and those who hate them. I hate them.) By the way, a bug fix is in the form of a patch, update, upgrade, or insecticide, depending on the type of bug involved. See also bug fix; Edison,Thomas Alva; entomology; etymology; and pedant
- An undocumented feature. (That's a joke.)
Defined nowadays as a programming error in a software program and usually having undesirable effects, the term allegedly stems from a real insect that was found to have disturbed operations in one of the early computer systems.
See Also: Computer.
A persistent error in software or hardware. If the bug is in software, it can be corrected by changing the program. If the bug is in hardware, new circuits have to be designed. Although the derivation of bug is generally attributed to the moth that was found squashed between the points of an electromechanical relay in a computer in the 1940s, the term goes back to the 1800s to refer to flaws in mechanical systems. See buggy, bug fix, software bug, broken, Heisenbug and Web bug. Contrast with glitch.
A Note from the AuthorOn October 19, 1992, I found my first "real bug." When I fired up my laser printer, it printed blotchy pages. Upon inspection, I found a bug lying belly up in the trough below the corona wire. The printer worked fine after removing it!
bug - Cultural Definition
A generic term that describes a malfunction of undetermined origin in a computer or other electronic device.
- The term originated in the 1940s when the examination of a large computer revealed that an actual insect had landed on one of the circuits, shorting it out and shutting the machine down.
bug - Medical Definition
- A true bug, specifically one having a beaklike structure that allows piercing and sucking.
- An insect or similar organism, such as a centipede or an earwig.
- A disease-producing microorganism, such as a flu bug.
- The illness or disease so produced.
- A defect or difficulty, as in a system or design.
bug - Phrases/Idioms
put a bug in (someone's) ear
bug - Science Definition
- An insect belonging to the suborder Heteroptera. See more at true bug.
- An insect, spider, or similar organism. Not in scientific use.