Assertion: collective noun | /r/UsedFor | refer to abstract notion
Facets:
value: in that mass nouns
type: OTHER
Source sentences:
text: Collective nouns differ from mass nouns (water, electricity, happiness, referring to an indefinitely divisible substance or abstract notion) in that mass nouns nearly never take indefinite articles (a/an; we would almost never say *a happiness) or generally don’t have plural forms.