In linguistics, plurality or [a] plural is a concept of quantity (i.e., grammatical number) representing a value of more-than-one. Typically applied to nouns, a plural word or marker (morpheme) is used to distinguish a value other than the default quantity of a noun, which is typically one. Plurality is a linguistic universal, represented variously among the languages as a separate word (free morpheme), an affix (bound morpheme), or by other morphological indications such as stress or implicit markers/context.

In the English language, singular and plural are the only usual grammatical numbers, with minor dual exceptions ("both", "either", etc.)

A plural is commonly abbreviated pl. in dictionaries. In part-of-speech tagging it has other notation which distinguish different types of plurals based on the grammatical and semantic context.