random-walk

random walk

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.

Origin:
1900–05

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
random walk
 
n
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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