1. foundationalist - Noun
2. foundationalist - Adjective
foundationalist (plural foundationalists)
(philosophy) A supporter of foundationalism, the doctrine that beliefs derive justification from certain basic beliefs
foundationalist (comparative more foundationalist, superlative most foundationalist)
Of or relating to foundationalism.
O'Brien 2006, p.87 Foundationalist internalists have held that basic beliefs are justified by mental events or states, such as experiences, that do not constitute beliefs. Source: Internet