Expansion may refer to: In physics: expansion of space, thermal expansion, expansion fan. In computer hardware: an expansion card In computer programming: Expand 2.0, a JEE5 developing tool inline expansion In computer gaming: an expansion pack In mathematics: polynomial expansion Taylor Expansion expansion of a graph the converse of a reduct, in model theory or universal algebra. An expansion team in sports. In medicine, a trinucleotide repeat expansion disorder's the result of expans… (More on Expansion)