 ##  [Nonconservative Extension](/nonconservative-extension) 

  ##  [Nonconservative Extension](https://mathlogic.quantumdictionary.io/nonconservative-extension-0) 

  
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- Natural &amp; Formal Sciences -

**Mathematics &amp; Logic Dictionary**

 
Definition

An extension of a formal theory obtained by adding new axioms (or axiom schemata) that yields at least one new theorem expressible in the original language of the theory; in other words, the extension is not conservative over the base theory for sentences of the old language.