One of the mysteries of the English language finally explained.
An analysis which corresponds too closely or exactly to a particular set of data.
Designating or relating to a stream which, on the basis of its current flow, would have eroded a larger valley than it occupies.
with object Statistics. To produce or represent an analysis which corresponds too closely or exactly to (a particular set of data); to make (a model) fit a particular set of data too precisely. Also without object: to provide too close a fit.
1970s; earliest use found in Statistician. From overfit<br>early 20th century. From over- + fit, after misfit<br>mid 18th century (in an earlier sense). From over- + fit.
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