Fitting can refer to: Curve fitting, the process of constructing a curve, or mathematical function, that has the best fit to a series of data points A dress fitting Piping and plumbing fitting, used in pipe systems to connect straight sections of pipe or tube, adapt to different sizes or shapes, and for other purposes Compression fitting, a fitting used to join two tubes or thin-walled pipes together Lightbulb socket or lamp fitting Persons with the surname Fitting Andrea Fitting, founder and CEO of Fitting Group Édouard Fitting (1898–1945), Swiss fencer Emma Fitting (1900–1986), Swiss fencer Frédéric Fitting (1902–1998), Swiss fencer Hans Fitting (1906–1938), German mathematician Willy Fitting (1925–2017), Swiss fencer See also Fit (disambiguation) Fitter (disambiguation) Fetting, a surname Fitling, a hamlet in the East Riding of Yorkshire, England Overfitting, production of an analysis that corresponds too closely or exactly to a data set