grammar indicating that a noun involved in a construction refers only to a part or fraction of what it otherwise refers to. The phrase some of the butter is a partitive construction; in some inflected languages it would be translated by the genitive case of the noun
2.
serving to separate or divide into parts
—n
3.
grammar a partitive linguistic element or feature
[C16: from Medieval Latin partītīvus serving to divide, from Latin partīre to divide]