Locative (abbreviated LOC) 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.
The Proto-Indo-European language had a locative case expressing "place where", an adverbial function. The ending depended on the last vowel of the stem (consonant, a-, o-, i-, u-stems) and the number (singular or plural). Subsequently the locative case tended to merge with other cases: the genitive or dative. Some daughter languages retained it as a distinct case. The locative case is found in:
In Latin, the functions of the locative case were mostly absorbed by the ablative, but a separate locative is found in a few words.
The Latin locative case applies only to the names of cities and small islands and to a few other isolated words. The Romans considered all Mediterranean islands to be small except for Sicily, Sardinia, Corsica, Crete, and Cyprus. Britannia was also considered to be a "large island." There are a few nouns that use the locative instead of a preposition: domus becomes domī (at home), rūs becomes rūrī (in the country), humus becomes humī (on the ground), militia becomes militiae (in military service, in the field), and focus becomes focī (at the hearth; at the center of the community).
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