mass noun

noun

• a noun denoting something which cannot be counted (e.g. a substance or quality), in English usually a noun which lacks a plural in ordinary usage and is not used with the indefinite article, e.g. china, happiness. Contrasted with count noun.
• a noun denoting something which normally cannot be counted but which may be countable when it refers to different units or types, e.g. coffee (drank some coffee, ordered two coffees).