  “Abstract” nouns like sadness and wisdom and “concrete” nouns like water and furniture all belong to the morphosyntactic class of mass nouns. However, semantics for mass nouns have generally focused on concrete terms, i.e., terms that apply to concrete entities. This raises an important question: are abstract mass nouns a separate species of mass nouns, with their own semantic properties? Or can a general account be proposed, which would work both for concrete mass nouns and abstract ones?