Synaesthesia is the unconventional way in which the brain and body experience the five senses. These many different factors overlap and interact, and they change the regular definition of how to experience things such as food, music, sight, touch, and more. For example, when you listen to music, you not only experience the sounds, but you are interpreting them as well. Not only do you interpret the notes, but the tones and rhythms may induce a certain smell or remind you of a certain color. This way of interpreting your environment and experiences has been used and studied over the years.

The Futurist of 1909 felt that defining your one sense through others provoked a sort of "full" way of experiencing the world. They felt that to capture the true feeling of things a loaded sensory experience was necessary.

Blind individuals rely on synaesthesia to express their experience since the sense of sight is being compensated by the other four senses.