Definition of "bug" []

• A true bug. (noun)
• An insect or similar organism, such as a centipede or an earwig. See Regional Note at lightning bug. (noun)
• A disease-producing microorganism: a flu bug. (noun)
• The illness or disease so produced: "stomach flu, a cold, or just some bug going around” ( David Smollar). (noun)
• A defect or difficulty, as in a system or design. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "该版本的主要变化包括：针对 Internet Explorer 7 的 bug 修正；改进了 crypt32，包含新的导出向导；更好的支持无窗 Richedit；对 "打印" 对话框进行了改善；修复了 Windows 平台上的回归测试问题及其他许多 bug。"
• "The term "bug," while having a specific taxonomic meaning, is also used as an umbrella term to include land-arthropods in general, including arachnids, like scorpions and spiders."
• "I agree with Dave Winer's rant against what he calls bug graphics, and which I call kipple."