metatheory

noun
meta·theory | \ "+ \

Definition of metatheory 

: a theory concerned with the investigation, analysis, or description of theory itself if we investigate, analyze, and describe a language L1 … the sum total of what can be known about L1 and said in L2 may be called the metatheory of L1 —Rudolf Carnap

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History and Etymology for metatheory

meta- + theory

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