- the path taken by a point or quantity that moves in steps, where the direction of each step is determined randomly.
- the tendency of particles in random motion to achieve a net displacement or to drift in a particular direction.
- 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
- a route consisting of successive and connected steps in which each step is chosen by a random mechanism uninfluenced by any previous step
