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leetspeak

American  
[leet-speek] / ˈlitˌspik /

noun

Digital Technology.
  1. a coded spelling system and language used in very informal communications on the internet, featuring letters combined with numbers or special characters in place of letters that they may resemble, and including inventive misspellings, jargon, and slang.

  2. the spelling conventions and jargon of this system and language.


leetspeak British  
/ ˈliːtˌspiːk /

noun

  1. Also called: 1337.  a jargon used by some internet groups, in which standard English is translated into a mixture of letters, numerals, and symbols found on a computer keyboard

"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

Etymology

Origin of leetspeak

First recorded in 1980–85; leet (shortening and alteration of elite ) + -speak

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.

If pidgin languages create a simplified slang to foster cross-cultural communication, leetspeak deliberately complicates the root language, replacing letters with numbers and symbols and swapping characters.

From New York Times • Mar. 28, 2017