Definitions

1. adjective

Relating to or denoting a grammatical case that expresses the means or instrument by which an action is performed or a state is brought about.

“The illative case in some languages is used to express the means by which an action is performed.”

2. noun

A grammatical case that expresses the means or instrument by which an action is performed or a state is brought about.

“The illative case is used in many languages to indicate the instrumentality of an action.”