Definition of there:

part of speech: adverb

In that place; in the place most distant; opposed to here, in this place; a word used as a mere introductory particle at the beginning of a sentence, adding to the sentence a peculiar and idiomatic emphasis, which can hardly be explained: there serves to throw the nominative after the verb, as " a man was," " there was a man"; in composition, there has the force of that, as thereby, by that.