- (in Gestalt psychology) the idea that things that are similar tend to be perceived as a unit: The law of similarity can be evoked with color, shape, size, texture, or almost any other attribute.
- the idea that things or actions that are similar have a connection to each other or can affect each other without a perceptible means of doing so:The ritual operates on the basis of the magical law of similarity, according to which the imitation of an action causes it to happen.
