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com

1 American  
[kom, see-oh-em] / kɒm, ˈsiˈoʊˈɛm /

  1. (on the internet) a top-level domain appearing as a suffix on domain names used for commercial establishments.

COM 2 American  
[kom] / kɒm /

noun

  1. Trademark. Comedy Central: a cable television channel.

  2. computer output on microfilm.

com- 3 American  

  1. a prefix meaning “with,” “together,” “in association,” and (with intensive force) “completely,” occurring in loanwords from Latin (commit ): used in the formation of compound words before b, p, m: combine; compare; commingle.

com. 4 American  

abbreviation

  1. comedy.

  2. comma.

  3. command.

  4. commander.

  5. commerce.

  6. commercial.

  7. commission.

  8. commissioner.

  9. committee.

  10. common.

  11. commonly.

  12. communications.

Com. 5 American  

abbreviation

  1. Commander.

  2. Commission.

  3. Commissioner.

  4. Committee.

  5. Commodore.

  6. Commonwealth.

COM 1 British  
/ kɒm /

noun

    1. a process in which a computer output is converted direct to microfiche or film, esp 35 or 16 millimetre film

    2. ( as modifier )

      a COM machine
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Com. 2 British  

abbreviation

  1. Commander

  2. committee

  3. Commodore

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
com 3 British  

abbreviation

  1. a commercial company

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
com- 4 British  

prefix

  1. together; with; jointly

    commingle
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
.com Cultural  

  1. Part of the Internet address of many companies and organizations. It indicates that the site is commercial, as opposed to educational or governmental.

Discover More

The phrase dot-com is used to refer generically to almost anything connected to business on the Internet.

The explosive growth of wealth connected to the Internet in the 1990s is often said to have created many “dot-com millionaires.”

Etymology

Origin of com1

First recorded in 1980–85; shortening of commercial ( def. ) or company ( def. )

Origin of com-3

< Latin, variant of preposition cum with

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Some Berkshire watchers think the company’s holdings in Amazon. com, VeriSign, Capital One Financial, Visa, and Mastercard could be Combs’ investments.

From Barron's • Feb. 13, 2026

The statue is the first to celebrate a rom com on Leicester Square's Scenes in the Square trail.

From BBC • Nov. 17, 2025

“Crypto dot com Arena? Staples Center is so stapled to my brain that I can’t call it anything else.”

From Los Angeles Times • Nov. 6, 2024

O cavalo Caramelo foi salvo com vida por bombeiros gaúchos e de São Paulo.

From Seattle Times • May 9, 2024

They stayed in the fodder house all that day, lying on top of the com, listening to the drip of the rain, waiting for dark, when they would set out.

From "Harriet Tubman: Conductor on the Underground Railroad" by Ann Petry

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.