Wiktionary
n. (context grammar English) A case used to indicate place, or the place where, or wherein. It corresponds roughly to the English prepositions "in", "on", "at", and "by". Languages that use the locative case include Armenian, Azeri, Belarusian, Catalan, Serbo-Croatian, Czech, Dyirbal, Latin, Latvian, Lithuanian, Polish, Quechua, Russian, Sanskrit, Slovak, Slovene, Swahili, Turkish and Ukrainian. Some languages use the same locative case construct to indicate when, so the English phrase "in summer" would use the locative case construct.
Wikipedia
Locative ( abbreviated ) is a grammatical case which indicates a location. It corresponds vaguely to the English prepositions "in", "on", "at", and "by". The locative case belongs to the general local cases together with the lative and separative case.
The locative case exists in many language groups.