(mathematics) Chosen or assumed among a branch of possible values of a multi-valued function so that the function is single-valued.
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Primary; most important; first level in importance.
Smith is the principal architect of this design.
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(obsolete, Latinism) Of or relating to a prince; princely.
The principal cause of the failure was poor planning.
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The vocabulary of software engineers, AI researchers, and anyone living in a terminal or on GitHub — from LLM to MCP, CORS to vibe coding, agentic to enshittification.
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