cognitivistPronunciation: /ˈkɒgnɪtɪvɪst/Definition of cognitivist noun a person who believes or works in cognitive grammar. adjective relating to cognitive grammar. Derivatives cognitivism noun Origin: 1950s (in the sense 'believing that moral judgements are true or false statements about moral facts'): from cognitive + -istcognitivist in other Oxford dictionaries Definition of cognitivist in the US English dictionary