turning point

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a point at which a decisive change takes place; critical point; crisis.
a point at which something changes direction, especially a high or low point on a graph.
Surveying. a point temporarily located and marked in order to establish the elevation or position of a surveying instrument at a new station.
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Origin of turning point

First recorded in 1850–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use turning point in a sentence

British Dictionary definitions for turning point

turning point

a moment when the course of events is changedthe turning point of his career
a point at which there is a change in direction or motion
maths a stationary point at which the first derivative of a function changes sign, so that typically its graph does not cross a horizontal tangent
surveying a point to which a foresight and a backsight are taken in levelling; change point
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012