What do you consider is Big Data and why?

I consider big data to be the research, collection, entry, and analysis of a large amount of information, often involving multiple sources and databases. To me it is a large collection of information or data that is used for some meaningful purpose after all the data and/or information is analyzed. I believe data is the collection of information therefore I consider big data to be the collection of a large amount of information from multiple sources. An example of big data would be the tracking of crime in New York City. The information on the nature of the crime, victims, perpetrators, and area are all taken into account and put into a database to predict, control, and focus on where the most crimes are being committed, what crimes are likely to happen in certain areas, who is committing such crimes and where, and many other useful information the police use to combat crime in their city.