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random walk

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noun
  1. Statistics. the path taken by a point or quantity that moves in steps, where the direction of each step is determined randomly.
  2. Physics. the tendency of particles in random motion to achieve a net displacement or to drift in a particular direction.
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Origin of random walk

First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for random walk

random walk

noun
  1. a mathematical model used to describe physical processes, such as diffusion, in which a particle moves in straight-line steps of constant length but random direction
  2. statistics a route consisting of successive and connected steps in which each step is chosen by a random mechanism uninfluenced by any previous step
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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