big data /ˌbɪɡ ˈdeɪtə/ noun1 •Data on a very large scale, such that it can only be gathered or processed with computers, especially with reference to its potential to allow for new breakthroughs or understanding in a particular field of study.The insights gained from big data can be used to improve products and customer service, but they can also be used in ways that creep out customers and make them feel uncomfortable or watched. — 2009