DadgogoAI Dictionary

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prompt injection

noun \ˈpräm(p)t in-ˈjek-shən\
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Definition of prompt injection

  1. : an attack in which hidden instructions are slipped into content an AI reads, such as a web page, email, or document, causing it to follow the attacker's instructions instead of the user's

    • White text on the web page said 'ignore previous instructions'—a classic prompt injection.
    • Prompt injection is the biggest unsolved security problem for agents.

Origin & history

first known use2022

Named by programmer Simon Willison in September 2022, by analogy with 'SQL injection'.

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Cite this entry

"Prompt injection." AI Dictionary, Dadgogo, https://dadgogo.com/dictionary/prompt-injection/. Accessed 4 Oct. 2026.

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