DadgogoAI Dictionary

Dictionary entry

system prompt

noun \ˈsis-təm ˈpräm(p)t\

also system message or custom instructions

TopicPrompting & Context First known use2023 Senses1
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Definition of system prompt

  1. : hidden instructions given to a model before the conversation starts, which set its role, tone, rules, and limits for every reply

    • The system prompt tells the bot to answer only questions about our product.
    • Leaked system prompts reveal how products shape their chatbots.

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Related terms

prompt the text, question, or instruction a person gives to an AI model to get a response guardrails rules, filters, and checks placed around an AI system to keep its outputs and actions within… prompt injection an attack in which hidden instructions are slipped into content an AI reads, such as a web… persona a role or character an AI is told to adopt, such as 'experienced editor' or 'friendly tutor'…

Cite this entry

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

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