captcha

nounB2Very rare — outside the 30,000 commonest English words, so you will meet it in writing rather than in speechToo rare in one of the two pools to compare — fewer than 20 uses in speech or in writing

Other forms: captchas

A captcha is the little online puzzle that checks you are human, not a robot. Fill in the captcha.

The old ones made you type words from scanned books, and so digitised them for free. A captcha now often watches how the mouse moves instead of asking anything.

Definitions of captcha

1nouncaptchaThe little online puzzle that checks you are human, not a robot.B2
“The captcha asked about traffic lights nine times.”

captcha is a test.

Practised in Technology & Internet

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