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The Best Internet Slang

CAPTCHA

or captcha

[kap-chuh] /ˈkæp tʃə/
noun, Digital Technology.
1.
an online test designed so that humans but not computers are able to pass it, used as a security measure and usually involving a visual-perception task:
Site visitors must solve the “distorted text” CAPTCHA before posting comments.
2.
a computer program that generates such tests.
Origin of CAPTCHA
2000-2005
2000-05; C(ompletely) A(utomated) P(ublic) T(uring) (Test to Tell) C(omputers and) H(umans) A(part)
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for CAPTCHA
Contemporary Examples
  • Called "CAPTCHA," it's essentially a test that's easy for a human to complete, but difficult or impossible for a computer to do.

Contemporary definitions for CAPTCHA
noun

a computer-generated squiggly-letter test that must be typed in by Internet/Web users to prove they are human

Examples

In order to send an email about a New York Times article, the site makes you type in a captcha.

Word Origin

by 2001; acronym for Completely Automatic Public Turing test to tell Computers and Humans Apart

Dictionary.com's 21st Century Lexicon
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