Definition, Meaning & Synonyms

captcha

noun

ˈkæp.tʃə

Definition

A type of challenge-response test used in computing to determine whether the user is human or a bot.

Examples

Many websites use captcha to protect their forms from spam submissions.
After entering your email, you will be asked to complete a captcha to verify you are not a robot.
The captcha system can involve tasks like selecting images or typing distorted letters.

Meaning

CAPTCHA stands for ‘Completely Automated Public Turing test to tell Computers and Humans Apart.’ It is commonly used to prevent automated software from performing actions that could harm or disrupt website services.