Definition of "internalist"

internalist

adjective
comparative more internalist, superlative most internalist
1. (philosophy) Holding that a particular mental phenomenon, such as motivation or justification, has an internal rather than external basis
  Quotations
  For one thing, many people regard rationality as an epistemically internalist notion, whereas reliability is a paradigmatic example of an epistemically externalist notion.
  2008 December 6, Sanford C. Goldberg, “Reliabilism in philosophy”, in Philosophical Studies, volume 142, number 1
noun
plural internalists
1. (philosophy) A supporter of internalism
  Quotations
  Perhaps I will appear presumptuous and misguided in claiming to explain the debate between internalists and externalists, for some would insist that there are a variety of related debates that get discussed under the heading of internalism and externalism.
  2007 July 12, Harold Langsam, “Rationality, Justification, and the Internalism/Externalism Debate”, in Erkenntnis, volume 68, number 1