Definitions
1.NounA noun case used to express means or agency—and is generally indicated in English by by or with with the objective. Languages that use the instrumental case include Armenian, Serbo-Croatian, Czech, Dyirbal, Georgian, Latvian, Slovene, Polish, Ukrainian, Quechua, Russian, Assamese, Tamil, Turkish and Sanskrit. Extinct languages that used the instrumental case include Old English, Old Saxon and Old High German.