Full Idea
Internalists take the notion of meaning to capture an aspect of an individual's current state of understanding, while externalists take the notion of meaning to reflect how an individual is embedded within her social and physical environment.
Gist of Idea
Internalist meaning is about understanding; externalist meaning is about embedding in a situation
Source
Laura Schroeter (Two-Dimensional Semantics [2010], 2.4.3)
Book Reference
'Stanford Online Encyclopaedia of Philosophy', ed/tr. Stanford University [plato.stanford.edu], p.35
A Reaction
This idea also occurs in discussions of concepts (filed here under 'Thought').