Before revision: The Routledge Encyclopedia of Philosophy defines metaepistemology as "the study of the nature, aims, methods and legitimacy of epistemology" whilst the anthologies Metaepistemology: Realism and Anti-Realism and Metaepistemology respectively define it as "the branch of epistemology that asks questions about the existence, nature and authority of epistemic facts and reasons " and "the metaphysics, epistemology, psychology, and language of epistemology ."
After revision: The Routledge Encyclopedia of Philosophy defines metaepistemology as "the study of the nature, aims, methods and legitimacy of epistemology" whilst the anthology Metaepistemology: Realism and Anti-Realism defines it as "the branch of epistemology that asks questions about the existence, nature and authority of epistemic facts and reasons ."