縮寫（英文：abbreviation，源自拉丁文 brevis，意为“短”）又称省略、缩略语、缩写词，是在使用拼音文字的语言中，对于常用的词组（多为专名）以及少数常用的词所采用的简便写法。缩写有幾種常見的形式：1. 截取词的首字母来代表这个词，如 C 代表 carbonium（碳）；2. 截取词的前几个字母，如 Eng. 代表 England（英格兰）或 English（英语）；3. 分别截取一个词的两个部分的第一个字母，如 cm. 代表 centimetre（厘米），TV 代表 television（电视）；4. 截取词的首字母和最後一个字母，如 No. 代表 numero（号数）；5. 截取词组中每个主要单词的第一个字母，如 UN 代表 the United Nations（联合国）。
- North Atlantic Treaty Organization → NATO（北大西洋公约组织）
- Organisation du Traité de l'Atlantique Nord → OTAN（法语，同上）
- Laser Interferometer Space Antenna → LISA（激光干涉空间天线）
- Terminal High Altitude Area Defense → THAAD（末段高空区域防御系统，缩写音译为萨德）
- Belgium, Netherlands, Luxembourg → Benelux（比荷盧三國關稅同盟）
- World Trade Organization → WTO（世界贸易组织）
- National Basketball Association → NBA（美国国家篮球协会）
- Central Intelligence Agency → CIA（美国中央情报局）
- United Kingdom → UK （英国）
- Комите́т госуда́рственной безопа́сности → КГБ（俄语，苏联国家安全委员会，缩写音译为克格勃）
- Compact Disc → CD
- abbreviation → abbr. 或 abbrev.
- Doctor → Dr.
- Company → Co.
- building → bldg.
- Street → St.
- Road → Rd.
- Boulevard → Blvd.
- Verb → V.
- telephone→ phone
- examination → exam
- mathematics → math
- laboratory → lab
- facsimile → fax
- memorandum → memo
- influenza → flu
- Schutzpolizist → Schupo（德语，保护警察）
- Geheime Staats-Polizei → Gestapo（德语，秘密国家警察，缩写音译为蓋世太保）
- Всесоюзный Ленинский Коммунистический Союз Молодёжи → Комсомол（俄语，苏联共青团）
- Коммунистический интернационал → Коминтерн（俄语，共产国际）
- Kriminalpolizei → Kripo（德语，罪案調查警察）。
- Staatssicherheit（意为“国家安全”）→ Stasi（德语，东德的国家安全部，缩写音译为斯塔西）
- Volkspolizist → Vopo（德语，东德人民警察）。
- 北京大学 → 北大
- 掃除文盲 → 掃盲
- 人民警察 → 民警
- 民意代表 → 民代
- 欧洲联盟 → 欧盟
- 东南亚国家联盟 → 东盟
- 苏维埃社会主义共和国联盟 → 苏联
- 中國共產黨 → 中共
- 国際連合 → 国連（日语，联合国）
- 東京大学 → 東大（日语，东京大学）
- 世界观、人生观、价值观 → 三观
- 農業、工業、國防和科學技術的現代化 → 四個現代化、四化
- 始终代表中国先进社会生产力的发展要求、始终代表中国先进文化的前进方向、始终代表中国最广大人民的根本利益 → 三个代表
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- 中国社会科学院语言研究所词典编辑室 (编). 现代汉语词典 (3版, 修订本). 北京: 商务印书馆. 1996. ISBN 978-7-100-01777-0.（简体中文）
- New Hart's Rules: The handbook of style for writers and editors. Oxford University Press. 2005. ISBN 0-19-861041-6.
- Merriam-Webster, Inc. Merriam-Webster's Dictionary of English Usage, 1994. ISBN 0-87779-132-5. pp. 21–22:
acronyms A number of commentators (as Copperud 1970, Janis 1984, Howard 1984) believe that acronyms can be differentiated from other abbreviations in being pronounceable as words. Dictionaries, however, do not make this distinction because writers in general do not:
"The powder metallurgy industry has officially adopted the acronym 'P/M Parts'"—Precision Metal Molding, January 1966.
"Users of the term acronym make no distinction between those pronounced as words ... and those pronounced as a series of characters" —Jean Praninskas, Trade Name Creation, 1968.
"It is not J.C.B.'s fault that its name, let alone its acronym, is not a household word among European scholars"—Times Literary Supp. 5 February 1970.
"... the confusion in the Pentagon about abbreviations and acronyms—words formed from the first letters of other words"—Bernard Weinraub, N.Y. Times, 11 December 1978.
Pyles & Algeo 1970 divide acronyms into "initialisms", which consists of initial letters pronounced with the letter names, and "word acronyms", which are pronounced as words. Initialism, an older word than acronym, seems to be too little known to the general public to serve as the customary term standing in contrast with acronym in a narrow sense.
- "acronym". The Concise Oxford Dictionary of Current English (1991), Oxford University Press. p. 12: "a word, usu[ally] pronounced as such, formed from the initial letters of other words (e.g. Ernie, laser, Nato)".
- "acronym" "Cambridge Dictionary of American English", accessed October 5, 2008: "a word created from the first letters of each word in a series of words."
- "acronym" "The American Heritage Dictionary of the English Language", accessed August 13, 2015: "1. A word formed by combining the initial letters of a multipart name, such as NATO from North Atlantic Treaty Organization or by combining the initial letters or parts of a series of words, such as radar from radio detecting and ranging. 2. Usage Problem An initialism. Usage Note: In strict usage, the term acronym refers to a word made from the initial letters or parts of other words, such as sonar from so(und) na(vigation and) r(anging). The distinguishing feature of an acronym is that it is pronounced as if it were a single word, in the manner of NATO and NASA. Acronyms are often distinguished from initialisms like FBI and NIH, whose individual letters are pronounced as separate syllables. While observing this distinction has some virtue in precision, it may be lost on many people, for whom the term acronym refers to both kinds of abbreviations."
- "acronym" "Collins Dictionaries", accessed August 13, 2015: "a pronounceable name made up of a series of initial letters or parts of words; for example, UNESCO for the United Nations Educational, Scientific, and Cultural Organization"
- "acronym" "Cambridge Dictionaries Online", accessed August 13, 2015: "an abbreviation consisting of the first letters of each word in the name of something, pronounced as a word: AIDS is an acronym for 'Acquired Immune Deficiency Syndrome'."
- "acronym" "Cambridge Dictionaries Online", accessed August 13, 2015: "Acronyms are words which are formed from the first letters of other words, and which are pronounced as full words."
- "acronym" "Wordsmyth, the Priemier Educational Dictionary-Thesaurus", accessed August 13, 2015: "a type of abbreviation used as a word, formed by combining the initial letters (or initial parts) of words that make up a particular string. The pronunciation of an acronym is based on the typical rules of pronouncing words in a language and is not made up of the sounds of the names of individual letters. NASA is an acronym for 'National Aeronautics and Space Administration.' The abbreviations 'FBI' and 'DVD' are not acronyms, but 'AIDS,' 'FICA,' and 'PIN' are."
- "acronym" "NetLingo, the Internet Dictionary", accessed August 13, 2015: "Derived from the first letters of a phrase, acronyms are meant to make the phrase easier to say and remember. With an acronym, the first letter of each word makes up a new word that is, in fact, pronounceable (for example, SNAFU is pronounced "sna-foo" and WOMBAT is pronounced "wahm-bat")."
- "acronym". Medical Dictionary for the Health Professions and Nursing (2012). Stedman. "A pronounceable word formed from the initial letters of each word or selected words in a phrase (e.g., AIDS)".
- "acronym" "AES Pro Audio Reference", accessed August 13, 2015: "A word formed from the first letters of a name, such as laser for light amplification by stimulated emission of radiation, or by combining initial letters or parts of a series of words, such as radar for radio detecting and ranging. The requirement of forming a word is what distinguishes an acronym from an abbreviation (or initialism as it is also called). Thus modem [modulator-demodulator] is an acronym, and AES [Audio Engineering Society] is an abbreviation or initialism."
- "The Correct Use of Acronyms and Initialisms" "Scribendi Proofreading Services", accessed August 13, 2015: "An acronym is a word formed from the initial letters of a name or phrase. It is pronounced as if it were a word. Examples of common acronyms include "SARS" (severe acute respiratory syndrome) and "UNICEF" (United Nations International Children's Emergency Fund)"
- "The Difference Between an Acronym and an Initialism" "Today I Found Out", accessed August 13, 2015: "An acronym is a word formed from the initial letters of a name or phrase. It is pronounced as if it were a word. Examples of common acronyms include "SARS" (severe acute respiratory syndrome) and "UNICEF" (United Nations International Children's Emergency Fund)"
- Crystal, David (1995). "Abbreviation". The Cambridge Encyclopedia of the English Language, Cambridge University Press. ISBN 0-521-55985-5. p. 120: Under the heading "Types of Abbreviation", this article separately lists initialisms and acronyms, describing the latter as "Initialisms pronounced as single words", but adds, "However, some linguists do not recognize a sharp distinction between acronyms and initialisms, but use the former term for both."
- "The 10 Most Misunderstood Terms in IT" "TechTarget", accessed August 13, 2015: "An acronym is not any abbreviation, just one that forms a "sayable" word. Apart from that confusion, acronyms and other abbreviations cause confusion any time a reader is likely not to know what the spelled-out version is."
- "initialism" "Online Etymology Dictionary", accessed August 13, 2015: "initialism (n.) word formed from the first letters of other words or a phrase, 1957, from initial (n.) + -ism. The distinction from acronym is not universally agreed-upon; in general, words such as NATO, where the letters form a word, are regarded as acronyms, those such as FBI, where the letters sound as letters, are initialisms. The use of acronym in entries in this dictionary that are technically initialisms is a deliberate error, because many people only know to search for all such words under 'acronym.'"
- dGuide to the Third Edition of the OED. Oxford English Dictionary. 2010-08-19 [2012-12-19]. （原始内容存档于2015-09-06）.
- Allen, Robert (编). Full stop. Pocket Fowler's Modern English Usage 2nd. Oxford University Press. 2008. ISBN 978-0-19172707-8.
- What is a portmanteau morph?. LinguaLinks Library. 2003. （原始内容存档于2008-06-19）.
- Thomas, David. An invitation to grammar. Summer Institute of Linguistics. Bangkok: Mahidol University: 9. 1983.
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- Hartmann, R.R.K.; Stork, F.C. Dictionary of language and linguistics. London: Applied Science: 180. 1972.