Mass nounsMass nouns are nouns which behave like uncount nouns when they refer to a substance, e.g. Use detergent, and like count nouns when they refer to types or brands of substance, e.g. Use a strong detergent; More detergents are now available.Mass nouns have the same grammatical behaviour as Variable nouns see Section 3. In the Collins Cobuild English Dictionary, mass nouns are labelled N-VAR.When a mass noun in the singular or uncount form is the Subject of a verb, the verb is singular. When a mass noun in the plural is the Subject of a verb, the verb is plural.Nouns of this type belong to the following meaning groups:
The 'cheese' groupThe 'beer' groupThe 'silk' groupThe 'plastic' groupThe 'lipstick' groupThe 'cough mixture' groupThe 'bleach' groupThe 'acid' groupThe 'fossil fuel' groupThe 'moss' groupThe 'compost' groupThe 'fluid' groupNouns with other meanings
I pass the lighted window of a shop where perfume is sold.
A designer label often guarantees a new perfume arrives with a ready-made public profile.
Department stores are finding that French perfumes are selling slowly.