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captcha Line breaks: cap¦tcha
Pronunciation: /ˈkaptʃə/
(also CAPTCHA)

Definition of captcha in English:


A computer program or system intended to distinguish human from machine input, typically as a way of thwarting spam and automated extraction of data from websites.
Example sentences
  • The spammers are thinking up ever more ingenious ways to break the captchas.
  • Every time you edit a page, you have to pass a captcha.
  • I guess the spammers tools are too simplistic to even attempt to break the captcha.


Early 21st century: acronym from Completely Automated Public Turing test to tell Computers and Humans Apart.

Definition of captcha in:
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