The use of an expression with a different meaning and in a different context than usual is known as a metaphor..
The metaphor is a resource that both psychology, linguistics and literary theory use in their respective fields.
In literary theory, the metaphor will always appear as a literary device, which will consist of pointing out two terms between which a certain similarity can be established, one will be used in a literal sense and the other in a figurative sense. Here the metaphor presents three levels: the tenor, which is what the metaphor refers to, the vehicle, which will be what is said, the term in a figurative sense and the foundation, which will be the relationship that is born and is made between the vehicle and the tenor.
For example, in the sentence Laura's eyes are the mountain, mountain, it will be the vehicle, the eyes the tenor and the foundation would be the honey brown color of the eyes. Traditionally, in literature, metaphors have been used with two clear objectives, on the one hand, to establish relationships of an unprecedented nature between words and finally to discover unusual attributes in them, that is, to multiply the normal meaning of words. words to mean what they mean and lots of other possibilities.
Meanwhile, in linguistics, the metaphor will be one of the main causes of what is known as semantic change, since in this field, the metaphor will be one of the most common forms of extension of the field of application in a lexical and therefore capable of causing semantic changes, that is, a lexical form is used for a concept that shares some semantic characteristics with the most common concept designated by the lexical form. A clear example is the table leg, here it is clearly observed how a concept is named from a lexical form that designates another that has a similar functionality, because leg is called the part of an animal, although it is common extend the use to elements that serve as object support.
And finally, psychology, usually immerses itself fully in the study, analysis and observation of those experiences or metaphorical stories that individuals live and the power they hold in their internal change.
