This seed project aims to set the basis for the creation of a critical lexicon addressing the diverse ways in which materiality is performed within the arts and heritage fields, and, specifically, in museum practice. It draws on existing efforts to interrogate how we understand matter and knowledge (specifically through posthumanism) to expand the idea of materiality in itself. Due to their intrinsic relationship with language (and, therefore, culture and practice), lexicons have particular potential to emerge as critical tools to attempt forms of situated practice.