Captcha

Pronunciation: /kæp.tʃə/

Definitions of CAPTCHA

noun a 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

A1 I had to fill out a CAPTCHA form before I could access the website.

A2 CAPTCHA is used to prevent bots from spamming websites.

B1 The CAPTCHA code was difficult to read, so I had to try a few times before getting it right.

B2 Some websites use CAPTCHA to verify that a user is a real person and not a computer program.

C1 CAPTCHA technology has evolved over the years to become more secure and user-friendly.

C2 Hackers have found ways to bypass CAPTCHA systems, leading to increased security measures.

Examples of CAPTCHA in a Sentence

formal Please complete the CAPTCHA to verify that you are not a robot.

informal Just gotta do the CAPTCHA real quick before we can proceed.

slang Ugh, this stupid CAPTCHA is so annoying.

figurative The CAPTCHA felt like a digital obstacle course to prove my humanity.

Grammatical Forms of CAPTCHA

• past tense: CAPTCHAed
• plural: CAPTCHAs
• comparative: more CAPTCHA
• superlative: most CAPTCHA
• present tense: CAPTCHA
• future tense: will CAPTCHA
• perfect tense: have CAPTCHAed
• continuous tense: CAPTCHAing
• singular: CAPTCHA
• positive degree: CAPTCHA
• infinitive: to CAPTCHA
• gerund: CAPTCHAing
• participle: CAPTCHAed

Origin and Evolution of CAPTCHA

First Known Use: 2000 year

Language of Origin: English

Story behind the word: CAPTCHA is an acronym for 'Completely Automated Public Turing test to tell Computers and Humans Apart.' It was coined by Luis von Ahn, Manuel Blum, Nicholas J. Hopper, and John Langford in the early 2000s.

Evolution of the word: Originally created to distinguish between bots and humans on the internet, CAPTCHA has evolved to include various types of tests beyond distorted text, such as image recognition and puzzle solving.