In mathematics, a definition is used to give a precise meaning to a new term, instead of describing a pre-existing term. Definitions and axioms are the basis on which all of mathematics is constructed.
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Opinions expressed by Forbes Contributors are their own. I'm the executive editor of the Advisory Board's Daily Briefing, a popular health care newsletter that goes out to more than 150,000 subscribers. I'm also a blogger for ESPN's TrueHoop Network, a columnist at California Healthline, and a social media junkie.