[mass noun] n (1933): a noun (as sand or water) that characteristically denotes in many languages a homogeneous substance or a concept without subdivisions and that in English is preceded in indefinite singular constructions by some rather than a or an--compare count noun
MASS NOUN
Meaning of MASS NOUN in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012