Synesthesia is the condition in which the senses are mixed (e.g., a sound or a number has a colour, the sense of touch evokes emotions). There is also a time-space synesthesia. According to studies by David Brang of UC San Diego, Department of psychology, these individuals tend to perceive months of the year in circular shapes, usually just as an image inside their mind's eye. (Hooper. Rowan. New Scientist Life. 2010.)

Synesthesia is a condition where there is cross-triggering of the senses. One may trigger another (e.g., hearing sounds when seeing colors). (Bricklin, Mark, et al. Positive Living and Health. p 375. PA: Rodale Press, 1990.)

Synesthesia is a label for the phenomenon in the human brain whereby colors and numbers tend to be experienced as separate categories and are processed in discrete neural networks. The brains of synesthesiacs, however, tend to process these ordinarily separate categories in the same brain area. (Max Brockman, Editor. What’s Next? Dispatches on the Future of Science. p 90-102. NY: Vintage Books, 2009.)

Synesthesia is a phenomenon whereby immersing oneself in one of the senses tends to stimulate associations with the other senses. For example, low sounds tend to elicit visual images of dark colors; high sounds tend to lead one to images of light, bright colors. (Howard, Pierce J., PhD. The Owner’s Manual for the Brain. p 625. GA: Bard Press, 1994, 2000.)

Synesthesia is a neurologic phenomenon involving the conscious processing of multisensory stimuli that affects 10 in every million people. Emotions have been implicated as being involved with synesthesia. (Benson, Herbert, MD, with Marge Stark. Timeless Healing. p 8-84. NY: Scribner, 1996.)